The following are effects of refraction of light: bending of light, change in wavelength of light, splitting of light rays.
What is Refraction?Refraction is the bending of light rays as it passes from one medium into another. Light rays refracts whenever it travels at an angle into a substance with a different refractive index. This change of direction is caused by a change in speed of the light rays. For example, when light travels from air into water, it slows down, causing it to continue to travel at a different angle or direction.
Effects of RefractionBending of lightChange in wavelength of lightSplitting of light rays.Learn more about refraction: https://brainly.com/question/27932095
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given the following expression, where variables a, b, c, d have been properly declared and assigned: a - b / c * x y % z what is the order the operations to be executed?
The order in which operations are executed in an expression is determined by the order of precedence of the operators.
In this case, the expression is:
a - b / c * x y % z
The order of precedence of the operators in this expression is as follows (highest to lowest):
Parentheses ()
Exponentiation (^)
Multiplication (*) and division (/), including modulus (%)
Addition (+) and subtraction (-)
Therefore, the operations in the expression should be executed in the following order:
Parentheses: Any operations inside parentheses should be executed first. There are no parentheses in the given expression, so this step is skipped.
Exponentiation: There are no exponentiation operations in the given expression, so this step is skipped.
Multiplication, division, and modulus: These operations should be executed in the order they appear from left to right. The expression becomes:
a - (b / c) * x * y % z
Addition and subtraction: These operations should be executed in the order they appear from left to right. The final form of the expression is:
a - ((b / c) * x * y) % z
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A man runs 300 m west in 60 seconds. He then runs 100m north-west in 20 seconds. What is his average velocity in meter per second?
Man moves at an average velocity of 5 meters per second.
What is his average velocity?A man runs 300 m west in 60 seconds. He then runs 100m north-west in 20 seconds. Average velocity is determined by dividing your displacement (a vector pointing from your initial location to your end position) by the total time, whereas average speed is determined by dividing the whole distance you went by the total time.We divide the total distance traveled by the total time taken by an object to determine its average speed.Man has traveled a total of 400 meters (300 + 100).
Total time required by man: 60 + 20 = 80 seconds.
average velocity is 400/80 = 5
Therefore, the average velocity of a man is 5 meters per second.
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when your car accelerates away from a stop sign, you feel like you're being pushed back into your seat.
No, when your car accelerates away from a stop sign, you feel like you're being pushed back into your seat. There is no force pushing you backward, just the seat pushing forward.
In the inertial reference frame, the only force acting on occupants while sitting inside the accelerating car is the force that causes occupants to accelerate which is given by mass times the acceleration. So from the inertial reference frame occupant accelerates.
What is the acceleration?
One of the important notions like Speed and Velocity, in Physics that is used to explain motion and to solve problems concerned to it, is called the acceleration.
No, when your car accelerates away from a stop sign, you feel like you're being pushed back into your seat. There is no force pushing you backward, just the seat pushing forward.
In the inertial reference frame, the only force acting on occupants while sitting inside the accelerating car is the force that causes occupants to accelerate which is given by mass times the acceleration. So from the inertial reference frame occupant accelerates.
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What happens to the potential energy of the skier as it moves down the slope?; What type of transformation is a skier skiing straight down a slope?; What kind of energy is skiing?; What transformations of energy take place on a ski slope?
The potential energy of the skier decreases as it moves down the slope. There is a change in mechanical forms of energy that take place when a skier is skiing down the slope. Potential energy changes into kinetic energy down the ski slope.
At the height of the slope, the skier has total potential energy. When it starts slipping, it lowers in height, and thus potential energy decreases. As it gains, speed down the slope, its kinetic energy increases.
So, there is loss of potential energy into kinetic energy. Reaching at the bottom, height decreases to zero, and thus, potential energy also becomes zero. At this time, kinetic energy is maximum before stopping. Due to friction of the surface, kinetic energy is dissipated into the surface, and kinetic energy also becomes zero.
At any point of time during skiing, the total mechanical energy ( potential + kinetic) remains the same for the skier.
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A 61.0 kg astronaut is on a space walk when the tether line to the shuttle breaks. The astronaut is able to throw a spare 12.0 kg oxygen tank in a direction away from the shuttle with a speed of 12.2 m/s, propelling the astronaut back to the shuttle. Assuming that the astronaut starts from rest with respect to the shuttle, find the astronaut's final speed with respect to the shuttle after the tank is thrown.
-1.9 m/s
However, there are no other forces in space than gravity and friction. After the tank is tossed, the astronaut's ultimate speed in relation to the shuttle is 4.7 m/s.
Despite this, there are no other forces in space than gravity and friction. Only the conversion of momentum is taking place here.
The equation m1v1=m2v2
Where, m1-mass (first object) is 61.0 kg and m2-mass (second object) is 12 kg, and v1-velocity (first object) is and v2-velocity (second object) is respectively.
Formulate the value as 61xv1=12x12.2 v1=4.7m/s.
After the tank is tossed, the astronaut's final speed relative to the shuttle is 1.9 m/s, we can infer.
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What was the acceleration of a car traveling at 30 m/s that slows to 10 m/s in 5 seconds?; How to measure velocity?; How do you find the final speed of a car in physics?; How are acceleration time and velocity related?
The acceleration of a car traveling at 30 m/s that slows to 10 m/s in 5 seconds is -4 m/s²
u=30m/s
v=10m/s
t=5 second
acceleration =v-u/t
acceleration =10-30/5
acceleration = -4 m/s²
Any process where the velocity changes is referred to as acceleration. There are only two ways to accelerate: either by accelerating faster, or by accelerating in the opposite direction. This is because velocity consists of both a speed and a direction. No matter how quickly you are moving, you cannot possibly be accelerating if you don't also change your direction and speed. As a result, even when traveling at a high speed—in this case, 800 miles per hour—a jet does not experience acceleration because its velocity is constant. The jet will accelerate as it slows down after landing and come to an abrupt stop.
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A 2.10 mH toroidal solenoid has an average radius of 5.80 cm and a cross-sectional area of 2.20 cm^2 .A.How many coils does it have? In calculating the flux, assume that B is uniform across a cross section, neglect the variation of B with distance from the toroidal axisB.At what rate must the current through it change so that a potential difference of 2.40 V is developed across its ends?
A toroidal solenoid has 1664 turns.
The rate of current is across it is 1142.86 A/s.
What is a solenoid?
A solenoid is a machine made of a casing, a coil of wire, and a moving plunger (armature). A magnetic field that generates around the coil when an electrical current is applied pulls the plunger in. A solenoid, to put it simply, transforms electrical energy into mechanical work.
Given,
Length L = 2[tex]\pi[/tex]r
= 2[tex]\pi[/tex]×0.058 = 0.3644 m
L = [tex]u_{o}[/tex][tex]N^{2}[/tex]A/l
N= [tex]\sqrt{LXl/u_{oA} }[/tex]
N = [tex]\sqrt{2.1X10^{-3}X0.3644/4\pi X10^{-7}X2.2X10^{-4}}[/tex]
N= 1664 turns
B) V = L [tex]\frac{dl}{dt}[/tex]
[tex]\frac{dl}{dt}[/tex] = [tex]\frac{V}{L}[/tex] = [tex]\frac{2.4}{2.1X10^{-3} }[/tex]
[tex]\frac{dl}{dt}[/tex] = 1142.86 A/s
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Suppose a spaceship is approaching the Earth at 0.25c and a message capsule is sent toward it at 0.25c relative to the Earth Randomized Variablesv = 0.25 cWhat is the ratio of the capsule’s speed, as measured on the spaceship, to the speed of light?μ/c =
The ratio of the capsule’s speed, as measured on the spaceship, to the speed of light; μ/c 1/4.
Define the term speed of light?One universal physical constant which is significant in many branches of physics is the speed of light in a vacuum, typically abbreviated as c. The exact value of the speed of light, c, is 299,792,458 meters per second (approximately 300,000 kilometres per second; 186,000 miles per second; 671 million miles per hour).For the stated question-
Consider sending a communication capsule to an incoming spacecraft at 0.25c relative to the Earth's randomized variablesv = 0.25 c.
Thus,
Let capsule’s speed is μ = 0.25 c.
Speed of light is c.
Then, ratio;
Capsule’s speed/Speed of light = 0.25 c/c
Capsule’s speed/Speed of light = 0.25
Capsule’s speed/Speed of light = 25/100
Capsule’s speed/Speed of light = 1/4
Thus, the ratio of capsule’s speed/Speed of light is found as 1/4.
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two identical, thin rods, each with mass mm and length ll, are joined at right angles to form an l-shaped object. this object is balanced on top of a sharp edge (figure 1). if the l-shaped object is deflected slightly, it oscillates.
The length of time that an action or state persists. The given L-shaped object made of two rods oscillates at a frequency of 2π√√2L/3g.
The rod weighs m grams.
The length of a single rod is L.
If it is connecting at, as indicated by the query, then the moment of inertia of the combined system follows.
mL²/3+3L²/3=2mL²/3
Here, I denotes the rod's moment of inertia, d denotes the separation of the center of gravity from the fixed point, and T denotes the length of time the L-shaped object oscillates.
Length of pendulam
Lcos45=L*1/√2=L/√2
Caluclate the time period
T=2π√I/mgl
=2π√2*mL²*√2/3*2mgl
oscillates at a frequency = 2π√√2L/3g
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Which section shows the greatest rate of positive acceleration?
The rate at which an object changes its velocity is known as acceleration, a vector quantity.
What kind of positive acceleration is the greatest?When the rate of change of velocity in an increasing sense (the slope of the velocity-time curve) is at its highest positive value, acceleration will be at its maximum positive value.The rate of change in velocity is greater for the graph with the sharpest slope. That thing is moving with the most velocity.The velocity-time graph displays a line with an upward slope, indicating a positive acceleration; the line is situated in the graph's positive area (corresponding to a positive velocity).When the car accelerates positively, its speed rises. As the car slows down, its speed decreases.When an object accelerates in the same direction as its velocity, it is doing so in that same direction. This object is therefore moving at a positive rate.To learn more about greatest rate of positive acceleration refer to:
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compare the final kinetic energies of pucks a and b . compare the final kinetic energies of pucks and . ka
Puck B's kinetic energy is 2 times puck A's kinetic energy.
what is kinetic energy?The energy an item has as a result of motion is known as kinetic energy. If we wish to accelerate an item, we must use force. We must put in effort in order to apply force.
Briefing:
Let the,
mass of puck A =m
mass of puck B = 2 m
The initial speed for both the pucks is the same as u and the distance is the same for both as s.
Let the tension is T for the same.
Then, the kinetic energy is given as,
KE= [tex]\frac{1}{2}[/tex] M[tex]V^{2}[/tex]
where M is the mass of an object
and v is the velocity of an object
as the speed is the same for both mass A and B so kinetic energy will depend on only the mass of the object.
[tex]\frac{KE OF A}{KE OF B}[/tex] = [tex]\frac{1}{2} M_{A} V_A^{2}[/tex] /[tex]\frac{1}{2} M_{B} V_B^{2}[/tex]
on putting the values of masses a and b
we get,
[tex]\frac{KE OF A}{KE OF B}[/tex] = [tex]\frac{1}{2}[/tex]
KE OF B= 2(KE OF A)
As a result, we can say that puck B has kinetic energy that is twice that of puck A.
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the complete question is:
Puck B has twice the mass of puck A. Starting from rest, both pucks are pulled the same distance across frictionless ice by strings with the same tension. Compare the final kinetic energies of pucks A and B.
in the past few million years of mars the main source of climate variation has been the slow escape of the atmosphere
The solar wind stripped away most of the Martian surroundings in only a few hundred million years after the planet misplaced its magnetic field.
Annual adjustments in temperature on a planet are caused by a combination of elements: axial tilt and variable distance from the solar. In orbit, Mars is ready 50 million miles farther away from the solar than Earth. which means it gets plenty less light and warmth to preserve it warm.
Not like the rocks of Earth, in which there are numerous matters which cause erosion, there are only two main weathering retailers on Mars: wind and acid fog.
Acid fog may be very essential, but due to the fact there is not loads of water, the movement of sand and wind is the maximum essential component to purpose adjustments to the planet's surface.
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what activates a convection current, starting the flow of a fluid?
Temperature differences in the mantle activate a convection current, starting the flow of a fluid.
What is convection current?Convection currents are a natural process of heat transfer that involves the movement of energy and heat from one location to another. We can see this in action by placing our hands above a campfire and feeling hotter. This is caused by convection currents.Convection currents transfer heat from one location to another by utilizing the mass motion of a fluid such as water, air, or molten rock. The heat transfer function of convection currents drives ocean currents, atmospheric weather, and geology.When a liquid is heated, it expands, becoming less dense or lighter and rising. As lighter hot liquid rises, cooler liquid from the top takes its place at the bottom. Therefore in the liquids convection currents are formed.To learn more about convection current refer to :
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the predictions of special relativity can sound implausible at first. which of the following provide observational evidence that the theory is correct? the predictions of special relativity can sound implausible at first. which of the following provide observational evidence that the theory is correct? subatomic particles in accelerators exhibit effects of time dilation and mass increase at high speeds. time dilation can be observed in airplanes. light is always observed to travel at the same speed. all of the above are correct.
All of the given options are correct:
Subatomic particles in accelerators exhibit effects of time dilation and mass increase at high speeds.Light is always observed to travel at the same speed.Time dilation can be observed in airplanes.The special theory of relativity or special relativity is a physical theory which states the relationship between space and time. This is often termed as STR theory. Special theory of relativity is based on two postulates –
Laws of Physics are invariant: The states of changed physical systems are not affected, whether these changes of state be referred to the one or the other of two systems in uniform translatory motion relative to each other.The Principle of Invariant Light Speed :Light is always propagated in empty space with a definite velocity c which is independent of the state of motion of the emitting body.In relative theory, reference frames play a vital role. It is used to measure a time of events by using a clock. An event is nothing but an occurrence that refers to a location in space corresponding to the reference frame. For instance, the explosion of a fire flower can be considered as an event.
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5. What is the difference in momentum between
a 50.0-kg runner moving at a speed of 3.00 m/s
and a 3.00×10³-kg truck moving at a speed of
only 1.00 m/s?
The difference in momentum between the runner and truck with different masses and velocities is 2850kgm/s.
What is momentum?Momentum in physics is the tendency of a body to maintain its inertial motion. It is the product of its mass and velocity, or the vector sum of the products of its masses and velocities.
Momentum, denoted by p, can be calculated as follows:
p = mv
According to this question, a 50.0-kg runner moving at a speed of 3.00 m/s and a 3.00×10³-kg truck moving at a speed of only 1.00 m/s.
Momentum of the runner = 50kg × 3m/s = 150kgm/sMomentum of truck = 3000kg × 1m/s = 3000kgm/schange in momentum (∆p) = 3000 - 150 = 2850kgm/s
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The largest telescopes in the world are used to detect:
A. ultraviolet
B. visible light
C. radio waves
D. x-ray
Answer: The largest telescopes in the world are used to detect:
B. visible light
Explanation:
The largest telescopes in the world are primarily used to detect visible light. These telescopes are designed to capture and analyze the light emitted or reflected by celestial objects such as stars, planets, galaxies, and other astronomical phenomena.
Visible light s a part of the electromagnetic spectrum that is visible to the human eye. It consists of different colors, ranging from red to violet, with each color corresponding to a specific wavelength. By studying the visible light emitted or reflected by celestial objects, astronomers can gather information about their composition, temperature, motion, and other properties.
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How fast will an electron be traveling after being ejected from the electron gun if the voltage is set to
500 V
? For full credit: (1) show your work, (2) show explicitly how the units simplify, and (3) express your answer as a percentage of the speed of light. Attach a separate sheet of paper if needed.
β=( 4/5 )^3/2 40N1/0
Electrostatic forces, which induce attraction of repulsion between particles, are caused by the electric charges of the particles. The speed of the electron blasted from electron gun is 13.25 x 106 m/s.
What does an electron consist of?An electron appears to be a subatomic particle with a negative charge whether it is linked to an atom or not (not bound). Along with the protons and neutrons, electrons are one of the three primary types of particles that make up an atom.
Why do we use electrons?In order to assist developers in producing cross-platform desktop applications utilizing JavaScript, HTML, and CSS, GitHub built the open source package known as Electron. This is accomplished by Electron by combining Chromium and Node. Using JavaScript, it is feasible to combine apps for Apple, Windows, and Linux into a single runtime.
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a fisherman notices that wave crests pass the bow of his anchored boat every 2.0 s . he measures the distance between two crests to be 7.5 m .
The waves are traveling at 3.75 m/s considering the distance between two crests to be 7.5 m.
Identify the known variables. In this problem, we have the time between two wave crests (2.0 s) and the distance between two crests (7.5 m).
Calculate the wave speed. To calculate the wave speed, we need to divide the distance between two crests by the time between them. This gives us the equation v = d/t.
Plugging in our known values, we get v = 7.5 m / 2.0 s = 3.75 m/s.
The waves are traveling at 3.75 m/s.
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ball a is dropped from the top of a building. one second later ball b is dropped from the same building. meglect air resistance
The distance widens if there is no air resistance or an equal amount of air resistance. This is owing to the fact that, although having identical accelerations, Ball A's speed will always be different from Ball B's since Ball A has been accelerating for longer than Ball B by one second.
What is Acceleration?The rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.
What is Speed?A scalar quantity, speed is defined as the quantity of the change in an object's position over time or per unit of time.
Hence, although having identical accelerations, Ball A's speed will always be different from Ball B's since Ball A has been accelerating for longer than Ball B by one second.
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An object is undergoing simple harmonic motion along the x-axis. Its position is described as a function of time by x(t) = 1.6 cos(3.5t - 1.4), where x is in meters, the time, t, is in seconds, and the argument of the cosine is in radians.
a) Find the amplitude of the simple harmonic motion, in meters.
b) What is the value of the angular frequency, in radians per second?
c) Determine the position of the object, in meters, at the time t = 0.
d) What is the object s velocity, in meters per second, at time t = 0?
e) Calculate the object s acceleration, in meters per second squared, at time t = 0.
f) What is the magnitude of the object s maximum acceleration, in meters per second squared?
The amplitude of the object is 1.6m, the angular speed, position, velocity and acceleration of the object at t = 0 ate 3.5rad/s, 0.256m, 4.459m/s and 3.136m/s² and the maximum acceleration is 19.6m/s².
The object is undergoing Simple Harmonic Motion along x-axis and its position is described by,
x(t) = 1.6cos(3.5t-1.4)
t is the time.
(a) The standard equation of simple harmonic motion is,
X = Acos(wt)
So, comparing the given equation with the standard equation, we get,
Amplitude = 1.6m.
(b) Again comparing the given equation with standard equation, we get the angular velocity as,
W = 3.5rad/s.
(c) To find the position of the object at t=0,
Putting t=0 in x(t) = 1.6cos(3.5t-1.4).
x = 1.6cos(-1.4)
x = 1.6 × 0.16
x = 0.256m.
(d) To find the speed of the object,
Differentiating x(t) = 1.6cos(3.5t-1.4) with respect to x,
v(t) = 1.6sin(3.5t-1.4)3.5
Putting t = 0
v(t) = 1.6 x -0.98 x 3.5
v(t) = 4.459m/s.
(e) To find the acceleration of the object,
Double Differentiating x(t) = 1.6cos(3.5t-1.4) with respect to x,
a(t) = -1.6(3.5)²cos(3.5t-1.4)
Putting t = 0,
a(t) = -1.6 x (3.5)² x 0.16
a(t) = 3.136m/s².
(f) For maximum acceleration,
cos(3.5t-1.4) = 1
a(t) = -19.6m/s².
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list and briefly define the 7 perspective/models of psychology
Cognitive, behavioral, psychodynamic, humanistic, biological, sociocultural, and evolutionary views are the perspective of psychology
How does psychology define and explain it from many angles?There are various psychological perspectives on and explanations for human behavior. When examining how people think, feel, and behave, psychologists draw on a range of views.
4 main psychological viewpoints
Psychoanalytical Viewpoint.Humanistic viewpointPerspective on traits.Social Cognitive Viewpoint.The majority of ideas and studies that aim to comprehend the cognitive, emotional, and behavioral processes that humans encounter on a daily basis are built around these objectives.
Cognitive, behavioral, psychodynamic, humanistic, biological, sociocultural, and evolutionary views are the main ones in psychology that have recently arisen.
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tycho brahe's contributions to astronomy include group of answer choices inventing the telescope observing the phases of venus, putting the nail in the coffin for geocentrism developing the theory of gravity making observations and collecting data used later by kepler to develop laws of planetary motion all of the above
Tycho Brahe made contributions to astronomy by making observations and gathering data that were later used by Kepler to develop laws of planetary motion.
Another one of the answer options in this group is creating the telescope. Kepler's first law states that all planets have elliptical orbits around the sun with the sun at one of the foci. Perihelion is the name given to the point when a planet is closest to the sun, and aphelion to the point when it is farthest away. A telescope is a tool used to observe far-off objects using their electromagnetic radiation emission, absorption, or reflection. originally exclusively referring to an optical device that observes far-off objects using lenses, curved mirrors, or a combination of the two.
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estimate the number of neutron stars black holes in the cluster relative to the number of main-sequence stars in the cluster.
According to estimates, the Night Sky alone contains between ten million and one billion supermassive black holes.
The contents of black holes.The singularity, the outside and inner event horizons, and black holes all have three "layers." A black wall's event horizon is the area surrounding its mouth beyond which light cannot travel. A particle cannot depart the event horizon once it has done so.
How might a black hole affect Earth?Black holes are numerous, but there is no need to be alarmed because they will not eat the Earth or the entire universe. The possibility of Earth ever being absorbed by a black storm is utterly remote. This is because their gravitational influence is less powerful at a distance.
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An 8.0-newton block is accelerating down a frictionless ramp inclined at 15° to the horizontal. What is the magnitude of the net force causing the block’s acceleration?
The magnitude of the net force causing the block’s acceleration is 8N.
We know that,
[tex]F_{x} = mg* cos\alpha[/tex] (force along x - axis) and
[tex]F_{y} = mg* sin\alpha[/tex] (force along y - axis)
The magnitude of net force is given by :
[tex]F_{net} = \sqrt{F_{x} ^{2} + F_{y} ^{2} }[/tex]
[tex]F_{net} = \sqrt{(mg*cos\alpha )^{2} + (mg*sin\alpha )^{2} } \\F_{net} = \sqrt{(mg)^{2}[ (cos\alpha) ^{2}+(sin\alpha) ^{2} ] } \\F_{net} = mg[/tex]
Given, weight = 8N and angle [tex]\alpha =[/tex] 15°
We know that F (force) = ma = mg = weight
Putting these values in above equation we get ,
[tex]F_{net} = 8N[/tex]
So the magnitude of the net force causing the block’s acceleration is 8N.
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what causes a bullet or projectile to travel down the barrel of a firearm and exit at the muzzle?; what is one thing that almost always happens when a cartridge is fired; what can affect the performance of a cartridge; firing mechanism of a gun; how is a single-shot different from a repeating firearm; which type of action operates automatically each time you pull the trigger; shot pellets and a bullet are examples of which basic component; what happens when you pull the trigger on a gun
When gunpowder explodes, a gaseous byproduct is produced that expands quickly. The cartridge is propelled through the barrel by the projectile due to this gas expanding.
An object which is in motion in the air with no other force beyond gravity influencing it is a projectile. A projectile is an object that is launched into the air with only downward gravity force acting on it and maintains speed due to its own inertia. A projectile is a body that is launched into space or the air. The trajectory of a projectile is defined as its curved path of travel. The free fall motion of any item in a horizontal path with constant velocity is Projectile Motion.
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Which of the following is an assumption rather than a prediction of Einstein's special theory of relativity?
A) length contraction B) time dilation C) No material object can reach or exceed the speed of light. D) the constancy of the speed of light E) the equivalence of mass and energy
the constancy of the speed of light
No material object can reach or exceed the speed of light is the assumption.
The Principle of Relativity : The states of changed physical systems are not affected, whether these changes of state be referred to the one or the other of two systems in uniform translatory motion relative to each otherThe Principle of Invariant Light Speed : Light is always propagated in empty space with a definite velocity c which is independent of the state of motion of the emitting body.In relative theory, reference frames play a vital role. It is used to measure a time of events by using a clock.An event is nothing but an occurrence that refers to a location in space corresponding to the reference frame. For instance, the explosion of a fire flower can be considered as an event.To know more about theory of relativity visit:
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A computerized spin balance machine rotates a 25-inch-diameter tire at 430 revolutions per minute.
(a) Find the road speed (in miles per hour) at which the tire is being balanced. (Round your answer to two decimal places.)
Diameter D = 25 inch
Radius r= D/2 = 25/2 = 12.5 inch
"1 ft = 12 inch and 1 mile = 5280 feet". R = 12.5×(1/12)×(1/5280) mile
Revolution n =430 rev./minute , n=430 × 60 rev./hour
Angular speed=2 × pi × n =2 × pi × n radian per hour =2 × pi × 430 × 60
a) Road speed = r × angular speed
Road speed = 12.5 × (1/12) × (1/5280) × (2 × pi × 430 × 60)
Road speed = 31.98 miles per hour
What is a revolution?
A revolution is a radical transfer in the founded order, often the founded government and social institutions.
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In a massive star supernova explosion, a stellar core collapses to form a neutron star roughly 10 kilometers in radius. The gravitational potential energy released in such a collapse is approximately equal to GM2/r where M is the mass of the neutron star, r is its radius, and G=6.67×10−11m3/kg×s2 is the gravitational constant.
PART A: Using this formula, estimate the amount of gravitational potential energy released in a massive star supernova explosion.
The amount of gravitational potential energy released in a massive star supernova explosion is 5.2x10^46J
The concept of gravitational potential energy is employed to provide a solution to this issue. U = GM^2/R is the equation's formula.
where the gravitational potential energy is denoted by U.
M is an object's mass, while R is its radius (10000m)
The gravitational constant G is 6.67 1011 m3/kg/s2.
We are aware that a neutron star has a mass that is 1.4 times that of the sun. It is understood that the sun weighs 2 x 10^30 kg.
We get the following equation when we swap out the values:
U = 6.67x10^11x(1.4x2x10^30)^2/10000 = 5.2x10^46J.
As a result, 5.2x10^46J of energy is produced during a large star supernova explosion.
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for laminar flow of air over flat plates with uniform surface temperature, the curve that most closely describes how the average heat transfer coefficient changes with the length of the plate is
For laminar flow of air over flat plates with uniform surface temperature, the curve that most closely describes how the average heat transfer coefficient changes with the length of the plate is option D.
What is the laminar flow of air?Laminar flow is described as airflow in which the entire body of air inside a specific location moves at a constant speed and in a single direction.
This layer of air has a tendency to stick to the wing because air has viscosity. The boundary layer initially glides over the airfoil's streamlined shape as the wing goes forward through the air. The boundary layer and flow are both laminar in this situation.
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determine the following for the sphere when it is at the bottom of the plane: its translational kinetic energy
At the bottom of the inclined plane, the total potential energy is converted into translational kinetic energy as shown in the below figure.
The sphere has two kinds of kinetic energy: translational and rotational. The translational kinetic energy is given by the usual equation: 1/2 mv^2.
The rotational energy is 1/2 Iω^2.
At the bottom of the inclined plane, the total potential energy is converted into translational kinetic energy as shown in the bellow figure
For a solid sphere I = 2/5 mr^2,
where r is the radius of the sphere. the last term of the rotational kinetic energy is the angular velocity, which may be expressed in radians/second or other units like the one shown below: linear velocity units/linear units. In these last cases, you have to change the angular velocity to linear velocity.
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