A photon collides with an electron and is scattered in a direction 105∘ from its original direction. If the photon loses 52.0% of its momentum in the process, what was the photon's initial wavelength?

A four legged sling distributes its load equally among its four legs. When the load is picked up, each leg forms 45° with the horizontal. The nominal breaking strength of the chain is specified to be 10 tons. If the load that is carried is 5 tons, Would it be safe to carry the load? What factors might play a role in setting 20% as the safety factor?

Directions: Write the value and uncertainty in the proper “presentation format”. (1) Round off uncertainty to two (2) significant figures (2) Round off value to same decimal place as last significant digit in uncertainty (3) When using scientific notation, make sure value and uncertainty are expressed to same power of ten, with decimal point placed after first digit in the value. Example: (5.423 ± 0.034) x 10-5 (4) Hint: If your value is greater than 10,000 or less than 0.01 you must use scientific notation. Note on Grading: This sheet must be done perfectly to receive an 8/10. If this second version is not done perfectly, then you will be given a new version, and if that one is completed perfectly then you will receive a 7/10. You will continue to lose points until this sheet is completed perfectly. See lab manual for details on presentation format.

# Value Uncertainty    Presentation Format (Value ± Uncertainty)

1 7.286277704 0.035965099

2 1.681735783 0.005686618

3 61.3568665 0.981143685

4 2690973.876 48907.07815

5 1.75447E-06 1.87125E-07

6 6.165959668 0.320999526

7 0.000861333 1.32518E-05

8 1.05259E-05 1.66169E-07

9 0.002142297 5.56807E-05

10 1.41859E-06 3.87179E-08

Generate an entangled pair of qubits. Send to Alice and Bob far away from each other. Both measure along basis in one of two possible orientations. The result is sent to Charlie at some later time, who compares the corellations and concludes the Bell inequalities have been violated.

But in Copenhagen, Charlie can say, the pair of results didn't become real until I collected both observations from Alice and Bob. They weren't real when either of them measured them. They only became real once I observed them. Then, both results, when they materialized, materialized at the same place. So, no nonlocality?

The position of a mass oscillating on a spring is given by x=(5.8cm)cos[2πt/(0.64s)]

Part A

What is the frequency of this motion?

Express your answer using two significant figures.

Part B

When is the mass first at the position x=−5.8cm?

Express your answer using two significant figures.

2) The position of a mass oscillating on a spring is given by x=(3.3cm)cos[2πt/(0.80s)].

Part A

What is the period of this motion?

Express your answer using two significant figures.

Part B

What is the first time the mass is at the position x=0?

Express your answer using two significant figures.

3)A ball rolls on a circular track of radius 0.70 m with a constant angular speed of 1.4 rad/s in the counterclockwise direction.

Part A

If the angular position of the ball at t= 0 is θ = 0, find the x component of the ball's position at the time 2.6 s . Let θ= 0 correspond to the positive x direction.

Express your answer using two significant figures.

Part B

Find the x component of the ball's position at the time 5.1 s .

Express your answer using two significant figures.

Part C

Find the x component of the ball's position at the time 7.5 s

Express your answer using two significant figures.

Thanks for the help!

A 2.00-kg package is released on a 53.1∘ incline, 4.00 m from a long spring with force constant 120 N/m that is attached at the bottom of the incline (Figure 1) . The coefficients of friction between the package and the incline are μs=0.40 and μk=0.20. The mass of the spring is negligible.

A. What is the speed of the package just before it reaches the spring?

B. What is the maximum compression of the spring?

C. The package rebounds back up the incline. How close does it get to its initial position?

.....

A bowling ball whose radius R is 0.11 m and whose mass M is 7.2 Kg, rolls from rest down a ramp whose length L is 21 m. The ramp is inclined at an angle θ of 34° to the horizontal ; ( Rotational inertia = ) a) How fast is the center of the ball moving when it reached the bottom of the ramp? Assuming the ball is uniform in density b) What is the kinetic energy associated with rotation and translation as the ball reached the bottom c) What is the angular velocity of the ball as it reached the bottom d) How much time does it take to reach the bottom

Challenge : The angle of depression from an airplane to the outskirts of a city measures 5.8 (degrees Tangent) The airplane is flying 6 miles above the ground at a speed of 200 mi/h. How much time will elapse before the airplane begins passing over the city?

A top-loading washing machine has a cylindrical drum that rotates about a vertical axis. The drum of one such machine starts from rest and reaches an angular speed of 6.0 rev/s in 12.0 s. The lid of the machine is then opened, which turns off the machine, and the drum slows to rest in 11.0 s. Through how many revolutions does the drum turn during this 23 s interval? Assume constant angular acceleration while it is starting and stopping.

A barrel contains a 0.259m layer of oil of density 659kg/m3 floating on water that is 0.331m deep.

a) What is the gauge pressure at the oil-water interface?

b) What is the gauge pressure at the bottom of the barrel?

c) At what depth below the oil surface is the gauge pressure 2630.6738Pa ?

A proud deep-sea fisherman hangs a 61.0-kg fish from an ideal spring having negligible mass. The fish stretches the spring 0.130 m.

(a) Find the force constant of the spring.
N/m

The fish is now pulled down 4.90 cm and released.

(b) What is the period of oscillation of the fish?
s

(c) What is the maximum speed it will reach?
m/s

Q5) Explain: A) why we see the sky is blue? B) why we see the Sun red at Sunset?

Q6) Explain: why when we rotate a polarized sun glasses looking at the reflection from a non-metallic surface, we can almost block all the reflection.

Suppose that in the same Atwood setup another string is attached to the bottom of m₁ and a constant force f is applied, retarding the upward motion of m₁. If m₁ = 5.70 kg and m₂ = 11.40 kg, what value of f will reduce the acceleration of the system by 50%?