A roller coaster reaches the top of the steepest hill with a speed of 6.80 km/h. It then descends the hill, which is at an average angle of 35° and is 56.0 m long. What will its speed be when it reaches the bottom? Assume µk = 0.16.

1. Can you explain how does a Michaelson interferometer work?

2. What can you use Michaelson interferometer for?

3. What was Michaelson interferometer first used for to clarify medium for light propagation?

A particle with mass m moves on the surface of a cylinder with radius R. At the same time, the force F = -kr on the particle affects it through the z axis. Using the z-and θ generalized coordinates, find the system's hamitonians. Solve the Hamilton equation after defining the conservative quantities.

Calculate (in MeV) the total binding energy for 40Ar.

Express your answer using four significant figures.

Calculate (in MeV) the binding energy per nucleon for 40Ar.

Express your answer using three significant figures.

Calculate (in MeV) the total binding energy for 40K.

Express your answer using four significant figures.

Part D

Calculate (in MeV) the binding energy per nucleon for 40K.

Express your answer using three significant figures.

Describe the process of making the viewed image clearer with the adjustment knobs in microscopy. Which do you use first? What do you need to be careful of?

Like all our lab exercises, the waves and sound lab will use a PhET simulator. Some of these simulators require you to enable Java or Flash. You can download and use the simulator on your desktop, or for some labs you can run it in your browser. Preferred browser settings and system requirements can be found at the “Running Sims” FAQ:  https://phet.colorado.edu/en/help-center/running-sims (Links to an external site.)

For this lab, we’ll use the “Sound Waves” simulator:

https://phet.colorado.edu/en/simulation/legacy/sound (Links to an external site.)

This is a Java sim and will require a download of the software. Start the simulator, and spend some time learning the interface. We will be using the "Listen to a Single Source" and "Measure"tabs, so check out the interface in both. Understand the sliders, the pause function, and the measurement functions before you begin.

1. Use the Listen to a Single Source tab in Sound Waves to start your investigation of sound. Click Audio enabled so you can hear the sound.

• When you adjust the frequency on the slider, how does the sound change? How does the visual model of the wave change? Write your observations.
• When you adjust the amplitude on the slider, again observe how the sound changes and how the visual representation of the waveform changes, and record your observations.
• Do you think the frequency on the slider perfectly matches the visual waveform, or is some adjustment being made for the visualization? Describe what you think this adjustment might be, both qualitatively and in terms of the wave equation y ( x , t ) = y m sin ⁡ ( k x − ω t ).

2. Sound is produced when something vibrates; this movement causes disturbances in the surrounding air pressure. Investigate how the speaker cone moves to produce different sounds. Then, explain the relationships between the movement of the speaker cone and the sound that is made; include drawings to support your explanation. Record your observations and attach any necessary sketches as screenshots.

3. Use the tools on the Measure tab to find the speed of sound in air. Use the relevant equations to find which measurements you can make to discover the appropriate value.

Using a data table like the one below, record several measurements (at least 6-8 to minimize variance) of wavelength and frequency.

4. Graph your data points in Excel or another graphing application, making sure to choose axes such that you get the speed of sound as the proportionality constant of the line. Refer to the wave speed equation to confirm this. Then, perform a fit to the line. Show the equation of the trendline on your graph and discuss whether you think the data you took accurately describes the relationship between wave speed, wavelength, and frequency.

Compare the value you found in your line fit to the actual, published value for the speed of sound in air, and include a percent error calculation. You can find the given value in several places, including your textbook and the internet - just make sure to cite your source properly. Use a temperature of 20 degrees C.

5. If you wanted to know the period of a wave, and did not have the frequency slider information available, could you find it with the tools in the simulator? Describe the method you would use to find the frequency (i.e. which measurements you would take, and which calculations you would perform).

6. Now, test the method you developed in part 5. Choose two frequencies and use your method to find the period. Record:

• the measurements you took, with appropriate units
• the calculations you did for each frequency.

Also, check to see how close you got - since period is the inverse of frequency (T = 1 f) then you can verify how well your method works. If it didn't work, describe any changes you would make to improve the results.

Lab Report:

Your lab report should be a typed document, with any necessary sketches or graphs attached as scans or picture files.

For the Sound Waves lab, hand in the following:

Part (a): Your preliminary observations and drawings from parts 1 and 2.

Part (b): Your data table and graph from part 3, and your calculated average speed, discussion of possible error, and citation for published speed of sound from part 4.

Part (c): A full description of the method you developed to find the period of a wave without knowing its frequency, including what measurements you would take and what calculations you would use. Also, your test of the method in full for two separate frequencies and your discussion of any errors and any changes you would make to the method.

I need fast for my Courseworks, need al least 4 hours after i post this question.

1. Explain About Linear Antenna And Surface Antenna and gives some examples!

2. What is Major Direction and Null Direction of EM Waves Radiation

Thank you for your answer! I'll appreciate it. Need answer for both of question

The inside of a wire has a current density of J (r) = ( 5 / r ) A/m²

radius of wire = 0.15 m

Find magnitude of magnetic field when at a radial distance of 0.05 m away using Ampere's Law.

Find the energy necessary to put 5 kg , initially at rest on Earth's surface, into geosynchronous orbit.

An object of mass

m₁ = 0.415 kg

starts from rest at point  and slides down an incline surface that makes an angle

θ = 36.0°

with the horizontal as shown. The coefficient of kinetic friction between the object and the incline surface is 0.455. After sliding down a distance d = 5.80 m, it makes a perfectly inelastic collision with an object of mass

m₂ = 0.645 kg

at point .

(a) Find the speed of

m₁

at point  just before the collision m/s

(b) Find the energy loss during the collision. Enter the magnitude.

J

(c) After the collision, the objects travel on a horizontal surface with a kinetic coefficient of 0.455. How long does it take until the objects come to rest at point ?.

  s

Show all your work. Make sure every number has a unit and you show the equations in the variable form before plugging in values. The rod is 2 m long and has a mass of 2 kg. The axis is at the left end. A 13 N force is applied perpendicularly to the axis, a 10 N force is applied at a 60-degree angle in the middle of the rod, a 20 N force is applied at the other end of the rod at an angle of 50 degrees, and there is a 5 N force that is applied along the radial line at the end of the rod. What is the angular acceleration of the system?

An object of mass m₁ = 0.435 kg starts from rest at point  and slides down an incline surface that makes an angle θ = 36.0°

with the horizontal as shown. The coefficient of kinetic friction between the object and the incline surface is 0.395. After sliding down a distance d = 5.60 m, it makes a perfectly inelastic collision with an object of mass m₂ = 0.650 kg at point .

a) Find the speed of m₁ at point  just before the collision.

(b) Find the energy loss during the collision. Enter the magnitude.

(c) After the collision, the objects travel on a horizontal surface with a kinetic coefficient of 0.405. How long does it take until the objects come to rest at point ?.

What color would you see if you were to shine a beam of yellow light and a beam of cyan light at the same spot on a white wall? (Warmup: Explain your answer. Review: Explain your answer by describing what happens to the relevant primary color components of light from the time the lights leave their respective sources to the time they enter your eye, and how your eye interprets that light.)

For each questions, please show me all your work and explain the answer.

1. A rocket is moving at 1/4 c relative to Earth. At the center of this rocket, a light source suddenly flashes. To an observer at rest in the rocket

a. the light pulse will reach the front of the rocket at the same instant that it reaches the back of the rocket.

b. the light pulse will reach the front of the rocket before it reaches the back of the rocket.

c. the light pulse will reach the front of the rocket after it reaches the back of the rocket.

2. A rocket is moving at 1/4 c relative to Earth. At the center of this rocket, a light source suddenly flashes. To an observer at rest on Earth

a. the light pulse will reach the front of the rocket at the same instant that it reaches the back of the rocket.

b. the light pulse will reach the front of the rocket before it reaches the back of the rocket.

c. the light pulse will reach the front of the rocket after it reaches the back of the rocket.

3. An astronaut in an inertial reference frame measures a time interval Δt between her heartbeats. What will observers in all other inertial reference frames measure for the time interval between her heartbeats?

a. more than Δt

b. Δt

c. less than Δt

d. The answer depends on whether they are moving toward her or away from her.

4. The special theory of relativity predicts that there is an upper limit to the speed of a particle. It therefore follows that there is also an upper limit on the following properties of a particle.

a. the kinetic energy

b. the total energy

c. the linear momentum

d. more than one of these

e. none of these

5. In a linear collider, two particles travel toward each other from opposite directions before colliding. If, in the lab reference frame, an electron travels toward the collision point at 2/3 c and a positron travels at 3/4 c, at what speed does the electron travel toward the positron in the positron’s reference frame? (Be sure to show all of the steps of your calculation without using a calculator.)