the video data to determine whether the ball is moving with constant velocity write whether you believe the ball is slowing as it approaches the can: Use evidence to back up your claim: B I U 6 = = = 8 D fx.
Velocity is a vector measurement of motion's rate and direction. Simply put, velocity is the rate of movement in one direction. Velocity can be used to calculate the speed of a car traveling north on a major highway and the speed of a rocket launching into space.
The velocity vector's scalar (absolute value) magnitude, as you might expect, is the speed of motion. Velocity is defined as the first derivative of position with respect to time in calculus. A simple formula involving rate, distance, and time can be used to calculate velocity.
Though they represent different measurements, speed, velocity, and acceleration are all related. Take care not to confuse these values.
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PLEASE HELP ME WITH THIS I HAVE NO IDEA HOW TO DO THE PROBLEM SOLVINGGG. also please put in answer and how to do it :)
a volleyball player hits a ball straight up with an initial velocity of 7.92 m/s. if another player hits the ball as it comes down at the same height, what is the final velocity of the volleyball?
B7-BCT14: OSCILLATING MASS ON SPRING DISPLACEMENT-TIME GRAPH ENERGY A cart attached to a spring is given an initial push, displacing it from its equilibrium position. A graph of displacement as a function of time for the cart is shown at right. The system has a total initial energy of 12 J and there is no friction. Five points are labeled A-E in the graph
The graph points are described below.
What is kinetic energy ?
The movement of an object or a subatomic particle exhibits the kinetic energy, often known as the energy of motion. Every atom and object in motion contains kinetic energy. Kinetic energy is present whenever something moves, such as when a person walks, a baseball soars through the air, a piece of food falls from a table, or a charged particle moves in an electric field.
What is potential energy ?
A sort of energy that can be stored but is reliant on the locations of various system components in relation to one another is known as potential energy. A spring gains potential energy when it is stretched or compressed.
P.E= 1/2Kn²
K.E = 1/2 mv²
since the sum will be always constant
At point A.E. is the maximum displacement and the minimum kinetic energy
At point C displacement is maximum so kinetic energy is maximum
At point, B, D it sum of both since displacement is just half of the maximum
so half of the P.E will be converted to K.E.
Therefore, graph points are described below.
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if a person weighs 600n on earth. would this person weigh more or less on a planet with a larger radius
If a person weighs 600 N on Earth, they would weigh less on a planet with a larger radius. The weight of an object is determined by the force of gravity acting on it, and the force of gravity is directly proportional to the mass of the object and inversely proportional to the square of the distance between the object and the center of the planet. As the radius of the planet increases, the distance between the object and the center of the planet increases, which would decrease the force of gravity acting on the object and therefore decrease the object's weight.
It's worth mentioning that the mass of the person would be the same, so their weight would change due to the gravitational force.
explain the working principle of van graffs generator
A Van de Graaff generator is a type of electrostatic generator that uses a moving belt to build up and transfer a large electrical charge to a hollow metal sphere or other high voltage terminal.
The basic principle of operation is that a belt made of a non-conductive material, such as rubber, is driven by a motor, passing over a pulley at the bottom of the generator and a second pulley at the top.
The belt is charged by friction as it rubs against the bottom pulley, which is connected to a high voltage source.
As the belt moves, it carries the charge to the upper pulley, where it is transferred to the high voltage terminal, such as the hollow metal sphere. The charge is transferred from the belt to the terminal through a process called corona discharge.
Once the charge is transferred to the terminal, it can be used for various applications such as particle acceleration, X-ray generation, and research in high voltage phenomena.
A Van de Graaff generator can produce high voltage output, up to millions of volts, due to the accumulation of charges on the sphere.
The terminal is insulated from the ground to prevent any discharge until a high voltage is reached. This makes it useful for various scientific experiments and applications.
Are there components of the velocity that are not determined by the measurement of the force? Constants A particle with charge 5.60 nC is moving in a uniform magnetic field B = 1.26 T )k The magnetic force on the particle is measured to be F = 3.60*10 - N)i+ 7.60*10"= N)j: yes Submit Request Answer Part B This question will be shown after you complete previous question(s): Part C This question will be shown after you complete previous question(s). Part D Calculate the scalar product U AZd B3 U . F = m/s . N Submit Request Answer Part E What is the angle between U and Give your answer in degrees AZd'
Yes, there are components of the velocity that are not determined by the measurement of the force.
What is velocity?
Velocity is a vector quantity that describes the rate of change of an object's position in a specific direction. It is defined as the displacement (change in position) of an object per unit time. The units of velocity are typically meters per second (m/s) or kilometers per hour (km/h). Velocity can also be represented by a vector arrow pointing in the direction of motion, with the magnitude of the arrow representing the speed of the object.
Yes, there are components of the velocity that are not determined by the measurement of the force. This is because the force experienced by a charged particle in a magnetic field is perpendicular to the velocity of the particle. So, the force measurement only provides information about the component of the velocity that is perpendicular to the direction of the magnetic field. The other component(s) of velocity, which is parallel to the magnetic field, cannot be determined from the force measurement alone.
To calculate the scalar product U dot B, you would need to know the velocity vector U. Without this information, it is not possible to calculate the scalar product.
The angle between U and B can be calculated using the formula:
theta = acos((U dot B) / (|U| x |B|))
where theta is the angle in degrees, U dot B is the dot product of the vectors U and B, and |U| and |B| are the magnitudes of the vectors U and B respectively.
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Please help thank you so much!!
Answer:
Below
Explanation:
CO2 buildup during exercise stimulates respiration
the next time you are charged by an angry elephant, it might be helpful to zig-zag as you run away instead of running in a straight line. why?
Run in a zig-zag figure if the elephant makes a real charge. If an elephant makes a real charge, shouting will not be sufficient to deter it. If you were noticed the signs of a real charge, start running.
A head starts and a zig-zag running pattern should keep you secure from the charge. A charging elephant can run much rapid than you, but if you zig-zag, you might be able to escape it.
Elephants find it problem to change directions due to their heavy size.
If you do run, the plan should be to place as much distance between yourself and the elephant.
Elephants that are afraid, upset, or angered can run up to 35–40 km/h (21–25 mph), while the fastest human being clocked in at around 37-38 km/h (23 mph) for a short sprint.
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four students are discussing the kind of energy that's fundamental to life on earth. thomas says it's electrical energy. susan opts for solar energy. lawrence argues in favor of chemical energy. kimberly is sure it's mechanical energy. who is correct? thomas susan lawrence kimberly
Susan is the correct answer. Susan opts for solar energy when they are discussing the kind of energy that's fundamental to life on earth.
What is solar power and how is it used?Solar energy systems either use photovoltaic (PV) panels or mirrors to focus solar radiation to convert sunlight into electrical energy. This power can be converted into electricity, or it can be stored thermally or in batteries.
Why is solar energy crucial?Clean energy comes from the sun.
When you generate power with solar panels, no greenhouse gas emissions are put into the atmosphere. Solar energy is a key energy source in the transition to the creation of clean energy since the sun produces more energy than humans could ever require.
What advantages does solar have?Each kilowatt-hour (kWh) of solar energy produced would significantly lower the emissions of harmful pollutants including sulfur oxides, nitrogen oxides, and particulate matter as well as greenhouse gases like CO2. Solar sunlight decreases water withdrawal and use.
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what tool would you use to measure how much energy air molecules have?
The temperature of the air determines how much energy does air molecules have, and we use thermometers to determine the temperature of the air molecules.
The temperature of the air around a person is known as air temperature, and it is commonly expressed in degrees Celsius (°C) or degrees Fahrenheit (°F). Thermocouples and thermistors have been utilised more recently, although mercury in glass thermometers have historically been used to measure it.
Devices that measure temperature or a temperature gradient are known as thermometers (the degree of hotness or coldness of an object). A thermometer contains two crucial components: a temperature sensor, which changes in response to changes in temperature (for example, the bulb of a mercury-in-glass thermometer or the pyrometric sensor in an infrared thermometer).
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In this problem, you will apply kinematic equations to a jumping flea. Take the magnitude of free-fall acceleration to be 9.80 m/s^2. Ignore air resistance. Part AA flea jumps straight up to a maximum height of 0.460 m. What is its initial velocity v0 as it leaves the ground?Express your answer in meters per second to three significant figures.Part BHow long is the flea in the air from the time it jumps to the time it hits the ground? Express your answer in seconds to three significant figures.
The initial velocity of jumping flea as it leaves the ground is 2.65[tex]\frac{m}{s}[/tex] and the time that it hits the ground is 0.542s.
The flea jumps with some initial momentum and ascends to its highest point under the influence of gravity.
The Newton's equations of motion can be used to calculate the flea's initial velocity.
By changing the initial velocity value in Newton's equation of motion, it is possible to calculate how long it takes a flea to reach its maximum height.
The time it takes a flea to go to the ground will be twice as long as the time it takes to get to its highest point.
The relationship between velocity, distance, and time of a motion with constant acceleration is described by Newton's equations of motion. The following are the three motion equations:
[tex]y-y_{o}=ut+\frac{1}{2}at^{2}[/tex]
Now putting the values of all variables find the initial velocity u
u=[tex]\sqrt{2(9.8)(0.360)}[/tex]
On solving we get,
u=2.65[tex]\frac{m}{s}[/tex].
Now using,
v=u+at
find the value of t
t=[tex]\frac{0-2.65}{-9.8}[/tex]
t=0.271s
and as the actual time is double of this time
So, time is 0.542s.
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a 3.2-kg model rocket is launched, shooting 51.8 g of burned fuel from its exhaust at an average speed of 632 m/s. what is the speed of the rocket after the fuel has burned (ignore gravity and air resistance). answer: m/s
9.8 m/s will be speed of rocket after fuel has burned.
Let m1 be the mass of the rocket, m2 - the mass of burned fuel.
V1 - velocity of the rocket after the fuel has burned,
V2 - average velocity of burned fuel.
According to the law of conservation of linear momentum :
0 = m₁V₁ - m₂V₂
V₁ = V₂m₂/m₁
V₁ = 9.8 m/s
The conservation of linear momentum states that, within some problem domain, the amount of momentum remains constant; momentum is neither created nor destroyed, but only changed through the action of forces as described by Newton's laws of motion.
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The two ropes seen in FIGURE are used to lower a 255 kg piano 5.00 m from a second-story window to the ground. How much work is done by each of the three forces?
The work is done by each of the ropes and gravity are 6375 Joules and 12750 Joules respectively during lowering the piano.
The mass of piano that has to be lift up is 255 kg.
The ropes has to lower the piano till height of 5 M from a second story window to the ground.
The work done during lowering the piano should be,
W = MgH
W is work done,
M is the mass,
g is the gravitational acceleration,
H is the height.
Putting values,
W = 255×10×5
W = 12750 Joules.
The work done by each rope will be 6375 Joules.
The work done by gravitation force will be 12750 Joules.
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Part A Are there components of the velocity that cannot be determined by measuring the force? View Available Hint(s) yes no Submit Part B Calculate the x component of the velocity o the particle Express your answer In meters per second t0 three slgnificant llgures. View Avallable Hint(s) AE$ Ur Submll
"Yes, there are components of the velocity that cannot be determined by measuring the force."
Two-dimensional motion is more complex than one-dimensional motion because velocities can point diagonally. A baseball, for instance, could be going diagonally while also moving both horizontally and vertically. We split the baseball's velocity vector into two separate horizontal start subscript and finish subscript directions to simplify our calculations.
It is challenging to attempt to solve for both the horizontal and vertical directions of a baseball in a single equation; it is preferable to use a divide-and-conquer strategy.
When we have two unknowns, we need to solve it using two equations.
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a flute acts like a double open-ended pipe and sounds a note with a fundamental frequency of 310 hz pitch. what is the second harmonic frequency of this pitch?
The second harmonic frequency of this pitch is 620 Hz.
What is frequency?Frequency is the number of occurrences of a repeating event per unit of time. It is also occasionally referred to as temporal frequency for clarity and is distinct from angular frequency.
Frequency is measured in hertz (Hz) which is equal to one event per second.
The fundamental frequency of a pipe is determined by the length of the pipe. The frequency of the second harmonic, also known as the first overtone, is twice the fundamental frequency.
So, if the fundamental frequency of the flute is 310 Hz, the second harmonic frequency would be 2 * 310 Hz = 620 Hz.
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1.calculate the resultant velocity of freda flyer who normally flies at 100 km/h and then encounters a 10 km/h headwind (a wind coming from ahead).
The resultant velocity of Freda flyer would be 90 km/h. A sector's headwind may become its tailwind, and conversely.
What are flying tailwinds?Tailwind is wind blowing from behind the aircraft. It reduces the lift and aircraft generally avoid taking off or landing in tailwind. A tailwind is wind that is blowing toward the back of the plane. Aircraft often stop taking off or flying in headwinds because it lowers lift. Aside from this, airplanes like tailwinds since they propel planes faster, which saves time and fuel. Crosswind is defined as wind blowing from an aircraft's side.
Is Tailwind an useful resource?Tailwinds are elements and situations that contribute to growth or have favorable effects on earnings and sales. Headwinds are elements or occurrences that hinder growth or have a negative impact on revenues and revenue.
This can be calculated by subtracting the headwind velocity (10 km/h) from the original velocity (100 km/h).
Resultant velocity = Original velocity - Headwind velocity
Resultant velocity = 100 km/h - 10 km/h = 90 km/h
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A box is made from a piece of card measuring 6 cm by 9 cm with squares of side x cm out of the corners. Use Desmos to find find the maximum volume.
The maximum volume of the box is 24 cm^3 when the side length of the corner squares is x = 3/2 cm.
What is volume?
Volume is a measure of the amount of space occupied by a three-dimensional object. It is a scalar quantity and it has units of length cubed, such as cubic meters (m³), cubic centimeters (cm³) or cubic inches (in³). The volume of an object can be calculated by multiplying its three dimensions: length, width, and height (or depth).
To find the maximum volume of the box, we can use calculus to find the critical points of the volume function.
First, we need to express the volume of the box in terms of the side length x. The volume of the box can be found by subtracting the volume of the four corner cubes from the volume of the entire card.
The volume of the entire card is 69x and the volume of each corner cube is x^3.
Therefore,
V = (69x) - 4(x^3)
Now, we can use the first derivative test to find the critical points of the volume function.
dV/dx = 54x - 12x^3
Setting dV/dx equal to zero and solving for x, we get x = 3/2.
Now, we can substitute this value of x back into the volume function and find the maximum volume of the box.
V = (69(3/2)) - 4((3/2)^3) = 27 - 4(27/8) = 27 - 3 = 24
Therefore, the maximum volume of the box is 24 cm^3 when the side length of the corner squares is x = 3/2 cm.
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a ball is thrown directly downward with an initial speed of 7.10 m/s, from a height of 30.8 m. after what time interval does it strike the ground?
The ball strikes the ground after an interval of approximately 1.48 seconds.
What is gravitational force?Gravitational force is the force of attraction between two objects that is proportional to the mass of the objects and the distance between them. It is the force that causes objects to fall towards the center of the earth and it is the force that holds planets and other celestial bodies in orbit around the sun.
To determine the time interval that the ball strikes the ground, we can use the equation of motion for vertical motion under the influence of gravity:
y = vit + 1/2g*t^2
where y is the vertical displacement (or height), vi is the initial velocity, t is the time interval, and g is the acceleration due to gravity (approximately 9.8 m/s^2).
We know that the initial velocity (vi) is -7.10 m/s (since it is thrown downward), the initial height (y) is 30.8 m, and the final height is 0 m (since it strikes the ground). So,
y = vit + 1/2g*t^2
0 = -7.10t + 1/29.8*t^2
To solve for t, we can divide both sides of the equation by -1/2*g
t = (-2*y/g) / vi
t = (-2*30.8/9.8) / -7.1
t = 1.48 s
So, the ball strikes the ground after an interval of approximately 1.48 seconds.
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a bumblebee can sense electric fields as the fields bend hairs on its body. bumblebees have been conclusively shown to detect an electric field of 60 n/c. could a bumblebee use this sense to detect the presence of another nearby bumblebee? suppose a bumblebee has a charge of 24 pc. how far away could another bumblebee detect its presence?
The 6cm far away could another bumblebee detect its presence. An electric field of 60 n/c.
What is the electric field's direction at the dot's specified location?The positive charge at the dot produces an electric field that is directed away from the positive charge. The negative charge at the dot is the target of the electric field that it produces.
Field strength: What is it?The field strength in physics refers to the size of a vector-valued field, such as the electric field E's magnitude expressed in volts per meter, or V/m. For instance, an electromagnetic field produces both a strong electric field and a strong magnetic field.
Given:
Electric field E = 60 N/C
Charge q = 24 pC
Electric field [tex]E=K\frac{q}{r^2}[/tex]
[tex]r=\sqrt{K\frac{q}{E} }[/tex]
[tex]K=8.99*10^9\frac{Nm^2}{C^2}[/tex]
[tex]r=\sqrt{(8.99*10^9)\frac{24*10^-12}{60} }[/tex]
[tex]r=6cm[/tex]
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Referring to the POWER trendline equation from analysis step 2, what mathematical relationship exists between the wave speed and the density of the medium.
The mathematical relationship exists between the wave speed and the density of the medium is that the density of the medium is inversely proportional to the wave speed.
What is wave speed?The amount of space a wave covers in a certain amount of time, such as the number of meters it covers in a second, is known as its wave speed. The following equation relates wave speed to both wave frequency and wavelength: Wavelength x Frequency = Speed.
Since sound is a mechanical wave, it moves through a medium by being compressed and rarefied. In an elastic medium, its velocity is proportional to the square root of the tension present. More elasticity in the medium results from higher density, which also increases the ease with which compression and rarefaction can occur. In this manner, the density increases while the sound velocity increases.
As a result, the square root of the medium's density and the velocity of sound in that medium are inversely related.
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What is the approximate range of masses that newborn main sequence stars can have?
0.1 to 150 solar masses
0.001 to 10 solar masses
0.1 to 10 solar masses
0.001 to 150 solar masses
0.1 to 1000 solar masses
Newborn main series stars can have masses between 0.1 and 150 times the mass of the sun. Less massive than the sun: is the most common star type in newly formed star clusters.
What is referred to as mass?A amount pf matter in such a particle a object is represented by its mass, which is denoted by the symbol m. Inside the International System (SI), the kilogram serves as the default unit of mass (kg).
What does mass signify in terms of physics?The resistance a body in matter offers to something like a change inside its speed or location as a result of the force that is applied is what it is in essence. The change a force applies produces a change that is smaller the more mass a body has.
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Newborn main series stars can have masses between 0.1 and 150 times the mass of the sun. Less massive than the sun: is the most common star type in newly formed star clusters.
What is referred to as mass?A amount pf matter in such a particle a object is represented by its mass, which is denoted by the symbol m. Inside the International System (SI), the kilogram serves as the default unit of mass (kg).
What does mass signify in terms of physics?The resistance a body in matter offers to something like a change inside its speed or location as a result of the force that is applied is what it is in essence. The change a force applies produces a change that is smaller the more mass a body has.
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In relation to the density of Earth's Moon, Mercury's density suggests that the planet
(a) has an interior structure similar to that of the Moon; (b) has a dense metal core; (c) has a stronger magnetic field than the Moon;
(d) is younger than the Moon
In relation to the density of Earth's Moon, Mercury's density suggests that the planet has a dense metal core option b is the correct option.
How does Mercury resemble the Moon?Similar to the Moon, Mercury is a planet. It lacks an atmosphere and possesses enormous, elongated round basins and circular impact craters all over its surface. Since Mercury appears to have been subjected to the same bombardment that sculpted the Moon in its early history, much of it resembles the lunar highlands.
What distinguishes planets and moons, and what do they have in common?No matter how big or little, the object a moon orbits is what distinguishes it from a planet. Every planet revolves around a star, just like our sun. Moons nevertheless revolve around planets. This implies that they orbit the sun as well, but only as a bystander on the journey of their planet.
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the allowed energies of a simple atom are 0.0 ev, 4.0 ev, and 6.0 ev. What wavelength(s) appear(s) in the atom's emission spectrum? Express your answer in nanometers. If there is more than one answer, enter your answers in ascending order separated by commas. 2. What wavelength(s) appear(s) in the atom's absorption spectrum? Express your answer in nanometers. If there is more than one answer, enter your answers in ascending order separated by commas.
The wavelength appear(s) in the atom's Emission spectra: 303.2 nm, 706.5 nm and in Absorption spectra: 303.2 nm, 706.5 nm
The energy levels of an atom are determined by the number of electrons in the atom and the energy levels of the electron. In a simple atom, the allowed energies are 0.0 ev, 4.0 ev, and 6.0 ev. The emission spectrum of an atom is determined by the energy levels of the electrons and the energy levels of the atom.
When an electron in the atom jumps from a higher energy level to a lower energy level, it releases energy in the form of a photon. The wavelength of the photon can be calculated using the equation: wavelength = hc/energy.
For example, when an electron jumps from the 4.0 ev level to the 0.0 ev level, it releases a photon with a wavelength of 706.5 nm. When an electron jumps from the 6.0 ev level to the 4.0 ev level, it releases a photon with a wavelength of 303.2 nm.
The absorption spectrum of an atom is determined by the energy levels of the electrons and the energy levels of the atom. When an atom absorbs a photon, an electron jumps from a lower energy level to a higher energy level.
The wavelength of the photon that is absorbed can be calculated using the same equation as for the emission spectrum. In this case, the absorption spectra will be the same as the emission spectra.
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a current of 4.2a passes through a heater with a p.d. of 14v across it. what is the resistance of the heater?
According to the question the resistance of the heater is 3.33 Ω.
What does the term "resistance" mean?The ohm, frequently written as a word and sometimes represented by the capital Greek letter omega, is the unit of resistance that is typically used.The resistance of a line is directly proportional to its diameter if the temperature and many other physical factors remain constant. It indicates that if the length increases, the resistance does too; conversely, if the length decreases, the resistance also decreases.
as we know that,
V = IR
I = 4.2A
V= 14 v
R = V/I
= 14/4.2
= 3.33 Ω
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impulse [im-puhls] [L] n. 1. the influence of a certain mood 2. a sudden urge or desire 3. a driving force caused by forward movement 4. Mechanics. a measure of momentum 5. Physiology. a wave of energy that travels along a nerve to create or stop movement 6. Electricity. a solitary, sudden flow of current in a single direction What is the meaning of impulse as it is used in the sentence below
Impulse refers to the measure of momentum.
What is impulse?
Impulse is a measure of the change in momentum of an object, and it is given by the product of force and time for which the force is applied. Mathematically, impulse is represented as the integral of force with respect to time. The impulse-momentum theorem states that the impulse applied to an object is equal to the change in momentum of the object. This means that the impulse is equal to the final momentum minus the initial momentum of the object.
As used in the sentence "The impulse applied to the ball by the racket can be calculated using the impulse-momentum theorem," impulse refers to the fourth meaning of the word as described in your question.
Specifically, it refers to a measure of momentum, which is the product of an object's mass and velocity. In this context, impulse is a vector quantity that is equal to the change in momentum of an object resulting from a force applied over a certain period of time.
The impulse-momentum theorem states that the impulse applied to an object is equal to the change in momentum of the object, and it is used in mechanics to calculate the effect of forces on moving objects.
Hence, Impulse refers to the measure of momentum.
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two charged ping-pong balls separated by a distance of 1.53 m exert an electric force of 0.0174 n on each other. what will be the force if the objects are brought closer, to a separation of only 29.7 cm?
If the particles are closely connected, to a distance of only 29.7 cm, the force is equal to 1.024N.
Describe a force.Force is indeed a necessary attribute that alters or has the potential to alter an object's posture of rest as well as motion as well as its shape.
What kinds of forces are there?These are the kinds of forces that occur when two objects come into contact with one another physically. There are several different kinds of contact forces, including friction, tensions, normal force, acting on an object force, applied force, and spring force.
Coulomb's law F = kQ1Q2/d^2
kQ1Q2 = Fxr^2
Substituting,
kQ1Q2 = 0.0174N x (1.53m)^2
kQ1Q2 =0.0532
29.7cm = 0.297 m
F = kQ1Q2/d^2
= 0.059/(0.297)^2
F = 1.024N
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a projectile is fired vertically upward from ground level with an initial velocity of 16 ft/s. (a) how long will it take for the projectile to hit the ground? (b) how long will the projectile be moving upward?
The projectile will rise to a height of 16 feet in 3 seconds, reach its highest point in 4.5 seconds, and then fall.
What characteristics create a good projectile example?In physics and engineering, projectile motion has a wide range of applications. The movement of any ball in sports, fireworks, and meteors entering the Earth's atmosphere are a few examples. These objects are referred to as projectiles, and the course they follow is referred to as a trajectory.
What are the different sorts of projectiles?Depending on the direction of the bullet's starting velocity, there are various forms of projectile motion. The three primary types are oblique projectile, horizontal projectile, and vertical projectile motion.
When S = 16 feet, find t in seconds:
16 = 120t - 16t²
16t² - 120t + 16 = 0
Factor:
(8) (2t² - 15t + 27) = 0
Factor further (2x² - 15x + 27):
(t - 3) (2t - 9) = 0
Equate each factor to 0:
t - 3 = 0
t = 3 seconds
2t - 9 = 0
2t = 9
t = 9/2 or 4.5 seconds
t = {3, 4.5
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ice cubes form as water is placed into an environment cold enough so that it freezes. what is the direction of heat transfer during this process?
According to the question, Heat always flow from high temperature to cold temperature so thats why water forms ice cube.
Describe heat.Heat is the result of the movement of kinetic energy within a material or an item, or from a source of energy to a material or an object. Radiation, conduction, and flow are the three mechanisms through which such energy can be transferred.
What does heat energy fundamentally consist of?The joule is the measure of heat quantity (J). Heat flow can be stated in terms of joules per second (J/s), however for practical purposes, the unit watt (W) is typically used because one joule per second equals 1 watt of heat flow.
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explain what would happen to motion of your mousetrap car if you had wound the string around the back axle of the car forwards instead of backwards make sure you use netwons 3rd law to quantify and qualify your response
If the string was wound around the back axle of mousetrap car forwards instead of backward, the car would not move.
What do you mean by motion?Motion is the change in a body's orientation or position over time. Every single thing in the universe is constantly in motion, including humans and animals.
This is because Newton's Third Law states that for every action, there is an equal and opposite reaction. In the case of a mousetrap car, the action is the force exerted by the string on the back axle as it unwinds, and the reaction is the force exerted by the back axle on the string, propelling the car forward.
If the string is wound around the axle forwards, the direction of the force exerted by the string on the axle will be opposite to the direction of motion, canceling out the propelling force and preventing the car from moving.
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a car accelerates uniformly from rest and reaches a speed of 20 m/s in 9.3 s. the diameter of a tire is 31.4 cm. find the number of revolutions the tire makes during this motion, assuming no slipping. answer in units of rev.
The number of revolutions the tire makes during this motion is 94 revolutions.
What is the distance travelled by the tire?
The distance travelled by the tire is calculated by applying the following kinematic equation.
s = [ ( u + v ) / 2 ] x t
where;
u is the initial velocity of the carv is the final velocity of the cart is the time of motion of the cars = [( 0 + 20 ) / 2 ] x 9.3
s = 93 m
The number of revolutions of the tire is calculated as follows;
1 rev = 2πr
where;
r is the radius of the tire = 31.4 cm / 2 = 15.7 cm = 0.157 mN (2πr) = 93 m
N = 93 / 2πr
N = (93) / ( 2π x 0.157)
N = 94 revolutions
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a triathlete perfoms 1000 kj of work and loses 400 kj of heat while swimming in cold water. how does the internal energy of the triathlete change? how much does the pool (50 m length, 20m width, 2 m depth) warm up? cp (h2o)
The internal energy of the triathlete change 680 J.
The process of converting energy from one form to another is called energy transformation or energy conversion. In physics, energy is a property that gives one the ability to move an object, lift it, or produce heat.
Conduction, radiation, and convection are the three different ways that thermal energy is transferred. Only fluids experience the cyclical process of convection. The total amount of energy in the universe has never changed and will never change because it cannot be created or destroyed.
1 cal = 4.184 J, thus 400 cal = 1673.6 J.
The change in internal energy is ΔU = ΔQ-ΔW
or ΔU = 1673.61000 673.6≈ 680 J
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