Light is refracted and spread out by a concave lens.
What is refraction?Refraction refers to a phenomenon which describes a change (bend) in the path taken by light when it comes in contact with surfaces between different transparent materials. The refraction of light is inversely proportional to its wavelength.
When parallel rays of light enter into a concave lens, the light waves refract outward (spread out). The light rays refract twice: first when entering the lens and second when leaving the lens. Only the light rays passing through the center of the lens remain straight.
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the fact that the force times the distance on one side of a lever's fulcrum equals the force times the distance on the other side of the fulcrum, is represented in the .
The force times the distance on the other side of the fulcrum, is represented in the moments.
What is fulcrum equals?
Calculate the mechanical advantage [tex]MA[/tex]using the equation [tex]MA = Fr/Fe.[/tex] For a class I lever, calculate the distance [tex]dr[/tex] of the fulcrum from the load using[tex]dr= L / (MA + 1)[/tex]. For a class II lever, determine the distance [tex]dr[/tex]of the fulcrum from the load using [tex]dr = L / MA[/tex].
How do you calculate the force of a fulcrum?
Class I Levers trial one: de = dr
In a class one lever the force of the effort (Fe) multiplied by the distance of the effort from the fulcrum (de) is equal to the force of the resistance (Fr) multiplied by the distance of the resistance from the fulcrum (dr).
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the_______ are a mixed group of substances, including lysergic acid diethylamide (lsd) and peyote that alters sensory perception.
hallucinogens are a mixed group of substances, including lysergic acid diethylamide (lsd) and peyote that alters sensory perception.
What is sensory perception?Detecting, identifying, describing, and responding to stimuli are all parts of sensory perception. There are five different categories of stimuli: mechanical, chemical, electrical, light, and temperature. When anything in the physical world awakens one of our senses, sensory awareness begins.An individual's ability to recognise, perceive, or sense the stimuli in their surroundings is known as sensory perception. The human body's various sense organs, including the eyes, ears, nose, tongue, and skin, contribute to this process through sight, hearing, smell, taste, and touch, respectively.Some are known by names like electroception or visual perception. Mechanical, thermal, electrical, or chemical stimulation could cause the sensory sense of pain. Chemical stimuli are used by the taste and smell faculties.
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a free-falling object has a speed of 30 m/s at one instant. exactly 2 seconds later its speed will be
The velocity of the freely falling body after the time 2 second is found as 49.6 m/s.
Explain the term acceleration due to gravity?Gravitational acceleration is the rate at which the speed of a body falling freely increases. Gravitational acceleration is measured in SI units of m/s², m/s², m/s².A body is considered to be in freefall when it only moves in relation to the Earth's gravity. An external force exerted on the ball will cause its motion to accelerate. Gravitational acceleration is another name for this rate of free fall.For the given question-
The freely falling body has the speed at an instant as u = 30 m/s.
Acceleration due to gravity g = 9.8 m/s².
After time t = 2 sec, the final velocity v m/s.
Using equation of motion,
v = u + gt
v = 30 + 9.8 x 2
v = 49.6 m/s.
Thus, the velocity of the freely falling body after the time 2 second is found as 49.6 m/s.
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What is an example of a constant rate?
In an expression, a graph, or perhaps a table of values, the steady rate of change can indeed be observed. The slope of an equation can be thought of as the constant rate of change.
What is meant by "constant rate of change"?The rate of variation is considered to be constant if the ratio pf output to input remains unchanged at any given point along function. Constant change rate is also known as slope. Linear functions will have a consistent rate of change.
What is a steady rate, specifically?When anything moves at a fixed, steady pace or at an average speed, it is said to be moving at a constant rate, also known as a uniform rate. For instance, 3 hours pass while driving. In the first hour, it travels 30 miles, in the second hour, 45 miles, and in the third hour, 75 miles.
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an 15-cmcm-long bicycle crank arm, with a pedal at one end, is attached to a 24-cmcm-diameter sprocket, the toothed disk around which the chain moves. a cyclist riding this bike increases her pedaling rate from 65 rpmrpm to 91 rpmrpm in 12 ss. assume constant angular acceleration.
The angular acceleration of the crank arm is 2.167 rad/s².
In physics, angular acceleration is the rate at which angular velocity changes over time. There are two types of angular acceleration. They are spin angular acceleration whereas orbital angular acceleration.
As opposed to orbital angular acceleration, which is the angular acceleration of a point particle about a fixed origin. Spin angular acceleration describes the angular acceleration of a rigid body as to its centre of rotation. The unit of measurement for angular acceleration is the angle per unit time squared and it is typically denoted by the symbol alpha.
When the angular speed changes from increasing counterclockwise to decreasing clockwise in two dimensions, the pseudoscalar known as angular acceleration is assumed to have a positive sign.
The angular acceleration of the crank arm is:
a = (91rpm - 65rpm)/ 12s = 2.167 rad/s²
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a rock climber stands on top of a 50 m -high cliff overhanging a pool of water. he throws two stones vertically downward 1.0 s apart and observes that they cause a single splash. the initial speed of the first stone was 1.6 m/s.
A) How long after the release of the first stone does the second stone hit the water? (in seconds) B) What was the initial speed of the second stone? (in m/s) C) What is the speed of the first stone as it hits the water? (in m/s) D) What is the speed of the second stone as it hits the water? (in m/s)
(a) The second stone hit after 2.91 seconds
(b) The initial velocity of the second stone must be 15.8 m/s vertically downward.
(c) The velocity of each stone when they reach the water is: First stone : -30.7 m/s Second stone: -34.5 m/s
The height and velocity of the stones can be calculated using the following equations:
y = y0 + v0 · t + 1/2 · g · t²
v = v0 + g · t
Where:
y = height at time "t".
y0 = initial height.
v0 = initial velocity.
t = time.
g = acceleration due to gravity (-9.81 m/s² considering the upward direction as positive).
v = velocity at time "t".
a) If we place the origin of the frame of reference on the water, then, the height of both stones when they hit the water will be 0. Using the equation of height for the first stone, we can obtain the time when the height is 0:
y = y0 + v0 · t + 1/2 · g · t²
0 = 50.0 m -1.91m/s · t - 1/2 · 9.81 m/s² · t²
0 = 50.0 m - 1.91 m/s · t - 1.6 m/s² · t²
Solving the quadratic equation:
t = 2.91 s
The two stones hit the water 2.91 s after the release of the first stone.
b) The second stone reaches the water in (2.91 s - 1.00 s) 1.91 s after released (remember that it was released 1.00 s after the first stone but both reached the water simultaneously). Then, using the equation of height, we can obtain the initial velocity knowing that at t = 1.91 s, y = 0:
y = y0 + v0 · t + 1/2 · g · t²
0 = 48.0 m + v0 · 1.91 s - 1/2 · 9.81 m/s² · (1.91 s)²
(-48.0 m + 1/2 · 9.81 m/s² · (1.91 s)²) / 1.91 s = v0
v0 = -15.8 m/s
The initial velocity of the second stone must be 15.8 m/s vertically downward.
c) We have to use the equation of velocity for each stone. We already know the time when the stones reach the water and the initial velocities:
First stone:
v = v0 + g · t
v = -2.18 m/s - 9.81 m/s² · 2.91 s
v = -30.7 m/s
Second stone:
v = v0 + g · t
v = -15.8 m/s - 9.81 m/s² · 1.91 s
v = -34.5 m/s
The velocity of each stone when they reach the water is:
First stone : -30.7 m/s
Second stone: -34.5 m/s
Therefore, the velocity of the first and second stones are -30.7 m/s and -34.5 m/s.
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What determines the specific heat capacity of a substance?; How do you find the specific heat capacity?; How do you convert heat capacity to specific heat?; What is specific heat capacity it is the quantity?
The formula for specific heat capacity, C, of a material having mass m, is C = Q /(m T). Typically, this is done with a calorimeter and dividing by the sample's mass
When a material's temperature rises by 1 K (or 1 °C), or when its mass increases by 1 kg, the specific heat capacity is defined as the amount of heat (J) absorbed per unit mass (kg). This measurement is expressed as J/(kg K) or J/(kg °C).By dividing the amount of heat applied to the specimen by the rise in temperature, heat capacity—a property unique to each material—is calculated. A specimen's specific heat capacity is based on its unit mass. It is the amount of heat required to increase a given mass's temperature. The heat in Joules typically required to increase the temperature of 1 gram of material by 1 Kelvin or 1 degree Celsius is 1. Because of its excellent ability to regulate temperature, water has a very high specific heat capacity.
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Answer:
Specific heat capacity is the amount of energy to raise 1kg of a substance by 1℃.
change in thermal energy = mass x specific heat capacity x change in temperature
ΔE = mcΔθ
ΔE = change in thermal energy (J)
m = mass (kg)
c = specific heat capacity (J/kg℃)
Δθ = change in temperature (℃)
Rearranged =
ΔE = mcΔθ
c = ΔE / mΔθ
❧ What is Newton’s Rainbow colored disc?
Answer:
there are 7 component white light colors
A fellow student with a mathematical bent tells you that the wave function of traveling wave on a thin rope is y(x,t) = 2.20 mm cos((6.99rad/m)x+(753 rad/s)t).Being more practical, you measure the rope to have a length of 1.50 m and a mass of 0.00338 kg. You are then asked to determine the following.(a) amplitude(b) frequency(c) wavelength(d) wave speed(e)direction the wave traveling(f) tension in the rope(g)average power transmitted by the wave
a) The amplitude is given by the coefficient of the cosine function, which is 2.20 mm.
b) The frequency is given by 120 Hz.
c) The wavelength is given by lambda 0.906 m.
d) The wave speed is given by 107.9 m/s.
e) The wave is traveling in the positive x direction since the coefficient of x is positive.
f) The linear density is given by mu = mass/length 0.00225 kg/m.
g) The average power transmitted by the wave per unit length of the rope is 270.0 W/m.
(a) The amplitude of the wave is the maximum displacement of the rope from its equilibrium position. In this case, the amplitude is given by the coefficient of the cosine function, which is 2.20 mm.
(b) The frequency of the wave is the number of oscillations per second. It is related to the angular frequency, which is given by the coefficient of t in the wave function. In this case, the angular frequency is 753 rad/s, and the frequency is given by:
f = 753 rad/s / (2 × pi) = 120 Hz
(c) The wavelength of the wave is the distance between two consecutive peaks or troughs. It is related to the angular wave number, which is given by the coefficient of x in the wave function. In this case, the angular wave number is 6.99 rad/m, and the wavelength is given by:
lambda = 2 × pi / 6.99 rad/m = 0.906 m
(d) The wave speed is the speed at which the disturbance travels along the rope. It is related to the angular frequency and the angular wave number by the equation:
v = omega / k
where v is the wave speed, omega is the angular frequency, and k is the angular wave number. In this case, the wave speed is given by:
v = 753 rad/s / 6.99 rad/m = 107.9 m/s
(e) The direction of the wave traveling can be determined from the signs of the coefficients in the wave function. In this case, the wave is traveling in the positive x direction, since the coefficient of x is positive.
(f) The tension in the rope is the force per unit length that is needed to maintain the wave. It can be calculated using the mass per unit length of the rope (the linear density) and the wave speed:
T = mu × v²
where T is the tension, mu is the linear density, and v is the wave speed. In this case, the linear density is given by:
mu = mass / length = 0.00338 kg / 1.50 m = 0.00225 kg/m
Substituting this into the equation for tension, we get:
T = 0.00225 kg/m × (107.9 m/s)² = 2.50 N/m
(g) The average power transmitted by the wave is the rate at which energy is transferred through the wave. It can be calculated using the tension in the rope and the wave speed:
P = T × v
Substituting in the values we calculated above, we get:
P = 2.50 N/m × 107.9 m/s = 270.0 W/m
This is the average power transmitted by the wave per unit length of the rope.
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based on fundamental laws of motion and gravity, which of the following best explains why kepler's second law (planets move faster in the parts of their orbit that are closer to the sun and slower when they are farther from the sun) is true? based on fundamental laws of motion and gravity, which of the following best explains why kepler's second law (planets move faster in the parts of their orbit that are closer to the sun and slower when they are farther from the sun) is true? the strength of gravity is inversely proportional to the square of the distance between two objects. the speed of a planet at any point in its orbit depends on its temperature, which varies with distance from the sun. the gravitational influence of other planets determines the speed of any particular planet's orbit. a planet's angular momentum must be conserved as it moves around its orbit.
The strength of gravity is inversely proportional to the square of the distance between two objects.
Kepler's Second Law characterizes the the rate of a planet alongside its elliptical path. Kepler's Second Law says says that a line jogging from the solar to the planet sweeps out same regions of the ellipse in same times. This manner that the planet hastens because it tactics the solar and slows down because it departs from it.
Newton's regulation states: The gravitational appeal pressure among factor loads is immediately proportional to the made from their loads and inversely proportional to the rectangular in their separation distance. The pressure is usually appealing and acts alongside the road becoming a member of them.
For the planets, as they cross across the Sun, their loads do not extrade however their distances from the Sun do. As they get in the direction of the Sun (distance receives smaller) they orbit faster (better velocity). The product of those portions stays unchanged, therefore angular momentum is conserved.
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8. While driving along a country lane with a constant speed of 15.0 m/s, you encounter a dip in the road. The dip can be approximated as a circular arc, with a radius of 47.0 m. What is the normal force exerted by a car seat on a 16.0 kg passenger when the car is at the bottom of the dip (N)?
The net force exerted was found to be 5.10N
Types of forces ?
Contact Forces: Let's first define force in order to better comprehend the notion of contact forces. A force can either push or pull something. A force is an outside agent that has the power to alter an object's motion or state of rest. A body at rest may be forced to move, and a body in motion can be forced to become stationary. It can function between two bodies that are near together as well as two ones that are a great distance apart. Let's think back to the tale of the apple and Newton to further comprehend this.
The Fallen Apple and Newton
We've all heard the story of how Newton came to believe that everything surrounding the earth is drawn to it when an apple fell on his head. Let's examine all the factors at play in this situation. The apple, which was relatively far from the earth's surface, is drawn toward it by the earth, and it falls on Newton's head, exerting force on it before it hits the ground.
acceleration = 15/47
force (F) =ma
=16x0.319
5.10N
The net force exerted was found to be 5.10N
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What is the density of a cube that has a mass of 12.6 and a measured side length of 4.1 cm?
Answer: 0.183 g/cm³
Explanation:
density = mass/volume = m/v
m = 12.6 g (I assume grams? you didn't provide the unit)
cube has equal sides, so volume of the cube = 4.1³ = 68.9 cm³
density = 12.6g/68.9 cm³ = 0.183 g/cm³
a force of 20n is applied toa screwdriver to pry the lid off a paint can. the screwdriver applies 65n of force to the lids. what is the mechanical advantage of the screwdriver
The mechanical advantage of the screwdriver is 3.25.
What is mechanical advantage?
The mechanical advantage of a machine is the measure of the ratio of the output force to input force.
Mechanical advantage of a machine is also known as force ratio of the machine.
Mathematically, the formula for mechanical advantage is given as;
M.A = Load / effort = output force / input force
The mechanical advantage of the screwdriver is calculated as follows;
M.A = 65 N / 20 N
M.A = 3.25
Thus, the mechanical advantage of the screwdriver is a function of the applied force and output force.
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shown here are four small solar system bodies. identify each and explain the differences among them.
The small bodies in the solar system include comets, asteroids, the objects in the Kuiper Belt and the Oort cloud, small planetary satellites, Triton, Pluto, Charon, and interplanetary dust. As some of these objects are believed to be minimally altered from their state in the young solar nebula from which the planets formed, they may provide insight into planet Earth and the formation and evolution of the solar system.
What are those four bodies ?
The Oort Cloud is a spherical shell of millions of icy bodies which surrounds the solar system at vast distances and is thought to be the birth place of long-period comets.The Kuiper Belt is a region extending from Neptune’s orbit out to the far and distant reaches of the solar system and possibly holds the best available record of the original interstellar materials that formed the solar nebula. This region beyond Neptune is also the most probable birthplace of the short-period comets.Comets are pristine remnants from the formation of the solar system that are comprised of minerals, rock and mostly ice, much like a dirty snowball. They travel around the sun in elliptical orbits and can be inclined to the plane of the solar system at any angle. Comets can sprout tails extending many tens of millions of miles, during their closest approach to the sun.Asteroids are rocky remnants from the formation of the solar system. They are not spherical and have differing compositions and histories. Most, although not all asteroids, reside in a region between Mars and Jupiter where numerous other small rocky worlds orbit the sunTo know more bout the four bodies, visit:
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when the car hit grounds, it pushes down the dirt and its front end sticks in the ground because of ____.
when the car hit the ground, it pushes down the dirt, and its front end sticks in the ground because of kinetic energy.
Kinetic energy is the type of energy that an item or particle has as a result of its motion. When work, which transfers energy, is performed on an item by exerting a net force, the object accelerates and obtains kinetic energy. Kinetic energy is a property of a moving object or particle that is affected by both its speed and its mass. Translation (or motion along a path from one location to another), rotation on an axis, vibration, or any combination of motions are all possible.
It depends on the vehicle and the shape of the bump. The exhaust will most likely be pulled off, door sills twisted, cross member broken, and anything that hangs down will be ripped off.
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this photograph shows three rock layers separated by two disconformities, as exposed in the walls of the grand canyon. one disconformity is above the reddish lens of devonian sedimentary rocks, and the other disconformity is below the reddish lens of devonian sedimentary rocks. drag the events so that they are in the correct order, from oldest at the bottom (6) to youngest at the top (1).
1 . Erosion that formed the Grand Canyon in which the layers are exposed
2. Deposition of Devonian ‘sedimentary rocksDeposition of the Mississippian Limestone .
3 .Withdrawal of the seas and erosion that formed the lower disconformity
4. Deposition of Cambrian Limestone.
Sedimentary rocks form at or near the surface of the earth, in contrast to metamorphic or igneous rocks that form deep within the earth. The main geological processes leading to the formation of sedimentary rocks are erosion, weathering, dissolution, precipitation and petrification.
Erosion and weathering include the effects of wind and rain that slowly break large rocks down into smaller rocks. Erosion and weathering turn rocks and even mountains into sediments such as sand and mud. Dissolution is a form of weathering, chemical weathering. During this process, the slightly acidic water slowly wears away the stone. These three processes create new sedimentary rock sources.
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A wood block of mass (m) rests on a larger wood block of mass (M) that rests on a wooden table. The coefficients of static and kinetic friction between all surfaces are μs and μk , respectively. What is the minimum horizontal force, F, applied to the lower block that will cause it to slide out from under the upper block? Express your answer in terms of some or all of the variables m, M, μs, μk, and appropriate constants. I got answer F= μs (2M+m)g however its wrong and has to be in terms of μk. i dont know what i did wrong. thanks
A force F is pulling on a wooden block of mass m that is resting on a rough, horizontal table (coefficient of friction = ) as depicted in the illustration.
A 1 0 0 N force acting horizontally on a block with mass 1 0 kg placed on a horizontal rough table with coefficient of friction = 0. 5 results in an acceleration of the block moving horizontally. The block accelerates if the location's g is 1 0 m/s/2. A force T is applied at an angle to the horizontal to draw a wooden block of mass M that is sitting on a rough horizontal surface. It is pulled by a force F=Mg operating at an angle of with the block's vertical side.
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An audio speaker producing a steady sound at an outdoor concert is 42 ft away from you. If you move to a position where the speaker is 77 ft distant, by what factor will the amplitude of the sound change?
One of the phenomena whose strength changes with the square root of the inverse of the distance from the source is sound.
define amplitude ?
A periodic variable's amplitude measures its change over a single period (such as time or spatial period). A non-periodic signal's magnitude in relation to a standard value is its amplitude. There are several definitions of amplitude (see below), all of which depend on how much the extreme values of the variable deviate from one another. The phase of a periodic function is frequently referred to as the amplitude in older publications.
=(42/77)^2
=(0.545)^2
=0.297025
Thus, the sound increases in volume by around 8% from its initial level.
(The noise level has been lowered by 10.98 dB.)
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a 0.50 kg book is being pushed on a horizontal table. the force pushing the book is 6n and the frictional force between the book and the surface has magnitude f
The magnitude of the frictional force is f = μ * 4.9 N.
What is magnitude?
Magnitude is a term used in physics to describe an object's maximum size and direction. Scalar and vector quantities both use magnitude as a common factor. We are aware that scalar quantities are those that have only magnitude by definition. Those quantities with both direction and magnitude are considered vector quantities. An earthquake's size is measured in terms of its length, breadth, and width. It is calculated based on the earthquake's actual size. A single magnitude is thought to exist for an earthquake. Due to variables like the type of material surface and distance from the epicentre, the magnitude of the shaking brought on by the earthquake varies depending on where it occurs.
The frictional force between the book and the surface is the resistive force pushing back against the pushing force of 6N. The magnitude of this resistive force depends on the coefficient of friction between the book and the table surface, as well as the normal force, which is equal to the weight of the book (0.50 kg * 9.8 m/s2 = 4.9 N).
The magnitude of the frictional force (f) can be calculated using the equation f = μ * N, where μ is the coefficient of friction and N is the normal force. Thus, the magnitude of the frictional force is f = μ * 4.9 N.
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A student gets his car stuck in a snow drift Not at a loss. having studied physics, he attaches one end of a stout rope to the vehicle and the other end to the trunk of a nearby tree, L = 13.4m away, allowing for a small amount of slack, W = 0.580m. The student then exerts a force Fon the center of the rope in the direction perpendicular to the car-tree line, as shown in the figure below. If the rope is inextensible and if the magnitude of the applied force is 576N, what is the force on the car? (Assume equilibrium conditions.)
The magnitude of the force on the car is 531.17N and the direction is -2.17 radians (or about -124.7 degrees) relative to the positive x-axis.
To solve this problem, we need to use Newton's third law, which states that for every action, there is an equal and opposite reaction. This means that the force applied by the student on the rope will be equal in magnitude but opposite in direction to the force applied by the rope on the car.
We can use this relationship to set up an equation to solve for the force on the car, Fcar. We know that the magnitude of the applied force is 576N and the direction is perpendicular to the car-tree line, so we can represent it as a vector Fapplied. The force on the car, Fcar, is also a vector and is equal in magnitude but opposite in direction to Fapplied.
We can use the Pythagorean theorem to find the magnitude of Fapplied, which is given by:
Fapplied = √(576² - W²) = √(331776 - 33824) = √(297952) = 544.82 N
The direction of Fapplied is perpendicular to the car-tree line, so we can represent it using the unit vector in the direction of the car-tree line, which is given by:
unit vector = (L/√(L² + W²), W/√(L² + W²)) = (0.973, 0.230)
We can then use this unit vector to find the components of Fapplied in the x and y directions:
Fapplied_x = Fapplied × unit vector_x = 544.82 N × 0.973 = 531.17 N
Fapplied_y = Fapplied × unit vector_y = 544.82 N × 0.230 = 125.36 N
Since the force on the car is equal in magnitude but opposite in direction to Fapplied, we can find the components of Fcar by negating the components of Fapplied:
Fcar_x = -Fapplied_x = -531.17 N
Fcar_y = -Fapplied_y = -125.36 N
We can then use the components of Fcar to find the magnitude and direction of Fcar using the Pythagorean theorem and the inverse tangent function:
Fcar = √(Fcar_x² + Fcar_y²) = sqrt(281441) = 531.17 N
direction = atan2(Fcar_y, Fcar_x) = atan2(-125.36, -531.17) = -2.17 radians.
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a pile driver lifts a 200 kg weight and then lets it fall onto the end of a steel pipe that needs to be driven into the ground. a fall of 1.5 m before striking the pipe drives the pipe in 45 cm. What is the average force exerted on the pipe?
The average force exerted on the steel pipe due to the mass is 8666.7 N.
The mass that the pile driver lift up is 200kg up to a height of 1.5 m and then it is dropped on a steel pipe to dig it till a distance of 45cm.
So, we can write,
Work done by the mass = world done on the steel pipe
MgH = Fx
Where,
M is the mass,
g is the gravitational acceleration,
H is the height to which the mass is lifted,
F is the average force exerted on the steel pipe,
x is the distance to which the steep pipe goes down.
Putting values,
200(10)(1.95) = F(0.45)
F = 8666.7 N.
The average force exerted on the pipe is 8666.7N.
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Two long parallel copper wires carry currents of 5A each in opposite directions. If the wires are separated by a distance of 0.5m , then the force between the two wires is
A. 10â5N, attractive
B. 10â5N repulsive
C. 2Ã10â5N, attractive
D. 2Ã10â5N,repulsive
The force between the two wires is 10^-5 N repulsive. option B is the correct answer
The force is repulsive because the currents are in opposition.
From the question, we have
force (F)= μ*i1*i2/2πd
=2*10^-7*5*5/0.5
=10^-5 N
The force between the two wires is 10^-5 N repulsive.
Force:
Physics defines a force as an influence that has the power to change an object's motion. When changing its velocity, such as when moving away from rest, a massed object may accelerate as a result of a force. Being pushed or pulled is a simple way to convey force. Given its magnitude and direction, a force is a vector quantity. Using the newton SI unit, it is computed (N). The letter F represents force. As pushes or pulls are seen as forces, this can provide a clear explanation of how forces are described.
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Can momentum be conserved for a system if there are external forces acting on the system? If so, under what conditions? If not, why not?
No, momentum cannot be conserved for a system if there are external forces acting on the system and the reason is because the total momentum in a closed system never changes. Though external forces acting on the system are unavoidable, they must balance out so that the net external force is zero in order for the system's momentum to remain constant.
In which case momentum is not conserved?If there is friction, gravity, or a net force, momentum is not preserved (net force just means the total amount of force). It implies that an object's momentum will vary if you operate on it.
Since you are changing the object's momentum by increasing or decreasing its velocity, this should be evident. The momentum of the particle varies as a result of the external agent's force, but the external agent's momentum must also change in order for the total momentum of both to remain constant, or conserved.
Note that During an instantaneous collision (contacct time t=0), the external force F does not transfer an impulse Ft=p. So, during the collision, momentum p is conserved.
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the radius of mars is approximately one half the radius of earth, and the mass of mars is approxamitely one-tenth that of Earth
The radius of mars is approximately the mean distance between the number of sick days taken and the mean number of sick days taken by all employees
What is radius of mars?
Only Mercury is smaller than Mars, which is the fourth planet from the Sun and the second-smallest planet in the Solar System. Mars is the name of the Roman god of war that appears in the English language.
On average, Mars has a temperature of -81 degrees Fahrenheit. The polar regions have winters with temperatures around -220 degrees Fahrenheit, while summers at lower latitudes average 70 degrees Fahrenheit.
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the flexible copper tubing that connects a 150-lb chlorine cylinder to a manifold should be rated at
A manifold connected to a 150-pound chlorine cylinder should include flexible copper tubing with a 500-psi rating (pressure). Chemically speaking.
copper is an element with the symbol Cu and the atomic number 29. It has a very high thermal conductivity and electrical conductivity and is a ductile metal. A freshly exposed surface of pure copper has a reddish-orange colour and is flexible and malleable. It serves as a building material, a conductor of heat and electricity, and a component of several metal alloys. The force perpendicular to an object's surface that is delivered per unit area over that force is known as pressure (symbol: p or P). The gauge pressure, also known as gauge pressure, is the pressure in relation to the surrounding air pressure. To express pressure, a variety of units are employed.
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Figure shows a closed loop of wire that consists of a pair of equal semicircles, of radius 3.7 cm, lying in mutually perpendicular planes.The loop was formed by folding a flat circular loop along a diameter until the two halves became perpendicular to each other. A uniform magnetic field B of magnitude 76 mT is directed perpendicular to the fold diameter and makes equal angles (of 45°) with the planes of the semicircles. The magnetic field is reduced to zero at a uniform rate during a time interval of 4.5 ms. During this interval, what are the (a) magnitude and (b) direction (clockwise or counterclockwise when viewed along the direction of B) of the emf induced in the loop?
(a) Magnitude of the average emf induced in the loop is 0.20 mV.
(b) direction is perpendicular to the field.
Average emf induced in the circular loop is given by;-
The magnitude of average emf induced in the loop is calculated as follows are;
emf = NA(B₁ - B₂)/t
by using the formula of the induced emf we calculate the average emf.
A = area of the loop
N =number of turns
B1 = initial magnetic field
B2 = final magnetic field
t=time
A = πr² = π(0.37)²
= 5.027 x 10⁻³ m²
emf = (1)(5.027 x 10⁻³)(0.45 - 0.37)/7.6
emf = 2.01 x 10⁻⁴ V
emf = 0.201 mV
Therefore, magnitude of the average emf is induced in the loop = 0.20 mV.
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which of the following are basic postulates of special relativity? (there could be more than one correct choice.) check all that apply. which of the following are basic postulates of special relativity? (there could be more than one correct choice.)check all that apply. the laws of physics are the same in all reference frames. the laws of physics are the same in all inertial reference frames. no material object can be accelerated to the speed of light. nothing can travel faster than the speed of light. the speed of light is the same for all observers.
The basic postulate of special relativity is nothing travels faster than the speed of light and the laws of physics will be the same in all the inertial reference frames.
The first postulate of special relativity is the idea that the laws of physics are the same in all inertial frames of reference and can be stated in their simplest form. His second postulate of special relativity is the idea that the speed of light c is constant regardless of the relative motion of the light source. Special Theory of Relativity is based on two of his postulates given by Albert Einstein. Consequences of special relativity include the relativity of invariant intervals, time expansion, length contraction, relativistic mass, universal velocity limits, mass-energy equivalence, and causal velocity-simultaneity.
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two wires carry equal currents in opposite directions, as in (figure 1). the field is 2.0 mt at a point below the lower wire. the distance between the wires is twice the distance between this point and the lower wire.
We cover the idea of the magnetic discipline produced with the aid of a modern-day wearing wire. Now remember the separation among the
2 wires to D. The direction is out of the page.
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Magnetic discipline can also be into the page, and on the way to be me or now not. I over to a birthday celebration. So this becomes minus of times may not I over to party. Now let's consider this. That equation from equation one, we will write the magnetic discipline electricity at .1 is- of two instances three/2 instances.
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Disclaimer:- your question is incomplete, please see below for the comlete question.
Two wires carry equal currents in opposite directions, as in (Figure 1). The field is 2.0 mT at a point below the lower wire. The distance between the wires is twice the distance between this point and the lower wire. What is the strength of the field at point 1? Express your answer with the appropriate units. What is the direction of the field at point 2 (the same distance above the upper wire as the 2.0 mT point is below the lower wire)? into the page out of the page What is the strength of the field at point 2? Express your answer with the appropriate units.
Potential energy arises when _- O we consider only conservative forcesc the system is isolated thermal energy can be neglected O the work from external forces is zero O interaction are included within the system
The correct option is (a). Potential energy arises when we consider only conservative forces.
Indeed, potential energy has a conservative nature. Conservative forces in physics are ones where the work performed by the force on an object traveling along a straight line depends only on the object's beginning and final positions, and not on the path traveled. Conservative forces and potential energy have a close relationship.
A force is said to be conservative if it moves an object between two points without regard for the direction it travels. Potential energy is the energy related to the placement or arrangement of an object within a force field.
Hence, the correct option is (a). Potential energy arises when we consider only conservative forces.
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#Complete question is:
(a) We consider only conservative forces
(b) The system is isolated
(c) The thermal energy can be neglected
(d) the work from external forces is zero
(e) Interactions are included within the system
If a vector pointing to the right has a positive magnitude, then one pointing to the left has a negative magnitude.
"If a vector pointing to the right has a positive magnitude, then one point to the left has a negative magnitude " is a false statement.
Vector, in physics, a quantity that has both magnitude and direction. This is usually represented by an arrow whose direction is the same as the quantity and whose length is proportional to the magnitude of the quantity. A vector has magnitude and direction, but no position. In other words, the vector does not change with translation unless the length changes.
Reason :
Because magnitude is never negative, only direction may be negative or positive.
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