A photon, moving in the +x-direction, scatters off a free stationary electron. The wavelength of the incident photon is 0.0210 nm. After the collision, the electron moves at an angle α below the +x-axis, while the photon moves at an angle θ = 80.3° above the +x-axis. (a) Calculate the speed of the electron (in m/s). (b) Calculate the angle α (in degrees).

A glass flask whose volume is 1000 cm3 at a temperature of 0.100 ∘C is completely filled with mercury at the same temperature. When the flask and mercury are warmed together to a temperature of 52.0 ∘C , a volume of 8.50 cm3 of mercury overflows the flask.

If the coefficient of volume expansion of mercury is βHg = 1.80×10⁻⁴ /K , compute βglass, the coefficient of volume expansion of the glass.

You plan to take a trip to the moon. Since you do not have a traditional spaceship with rockets, you will need to leave the earth with enough speed to make it to the moon. Some information that will help during this problem:

m_earth = 5.9742 x 10²⁴ kg
r_earth = 6.3781 x 10⁶ m
m_moon = 7.36 x 10²² kg
r_moon = 1.7374 x 10⁶ m
d_{earth to moon} = 3.844 x 10⁸ m (center to center)
G = 6.67428 x 10^-11 N-m²/kg²

1)

On your first attempt you leave the surface of the earth at v = 5534 m/s. How far from the center of the earth will you get?

2)

Since that is not far enough, you consult a friend who calculates (correctly) the minimum speed needed as v_min = 11068 m/s. If you leave the surface of the earth at this speed, how fast will you be moving at the surface of the moon? Hint carefully write out an expression for the potential and kinetic energy of the ship on the surface of earth, and on the surface of moon. Be sure to include the gravitational potential energy of the earth even when the ship is at the surface of the moon!

Blocks A (mass 3.00 kg ) and B (mass 14.00 kg , to the right of A) move on a frictionless, horizontal surface. Initially, block B is moving to the left at 0.500 m/s and block A is moving to the right at 2.00 m/s. The blocks are equipped with ideal spring bumpers. The collision is headon, so all motion before and after it is along a straight line. Let +x be the direction of the initial motion of A.

Part A) Find the maximum energy stored in the spring bumpers.

Part B) Find the velocity of block A when the energy stored in the spring bumpers is maximum

Part C) Find the velocity of block B when the energy stored in the spring bumpers is maximum.

Part D) Find the velocity of block A after the blocks have moved apart.

Part E) Find the velocity of block B after the blocks have moved apart.

Please answer this very simple conceptual physics question: Regarding a parallel plate capacitor-- Explain something different between the potential inside the plates compared to potential outside the plates.

A fisherman and his young nephew are in a boat on a small pond. Both are wearing life jackets. The nephew is holding a large floating helium filled balloon by a string. Consider each action below independently, and indicate whether the level of the water in the pond R-Rises, F-Falls, S-Stays the Same, C-Can't tell. (If in the first the level Rises, and in the second it Falls, and for the rest one Cannot tell, enter RFCCC)

A) The fisherman lowers himself in the water and floats on his back
B) The fisherman fills a glass with water from the pond and drinks it.
C) The nephew gets in the water, looses his grip on the string, letting the balloon escape upwards.
D) The fisherman knocks the tackle box overboard and it sinks to the bottom.
E) The nephew pops the balloon.

Hint: Think "Archimedes Principle". How does the volume of fluid displaced by a body which `floats' differ from that for a body which sinks?

Consider a plane wave of monochromatic green light, ? = 500 nm, that is incident normally upon two identical narrow slits (the widths of the individual slits are much less than ?). The slits are separated by a distance d = 30 µm. An interference pattern is observed on a screen located a distance L away from the slits. On the screen, the location nearest the central maximum where the intensity is zero (i.e., the first dark fringe) is found to be 1.5 cm from this central point. Let this particular position on the screen be referred to as P1.
(a) Calculate the distance, L, to the screen. Show all work.

(b) calculate the ditance between the first and second dark bands in the interference pattern. Shown all work.

(c)In each of the parts below, one change has been made to the problem above (in each case, all parameters not explicitly mentioned have the value or characteristics stated above). For each case, explain briefly whether the light intensity at location P1 would remain zero or not. If not, will P1 become the location of a maximum constructive interference (bright) fringe? In each case, explain your reasoning.

1) One of the two slits is made slightly narrower, so that the amount of light passing through it is less than that through the other.

2) The wavelength is doubled so that ? = 1000 nm.

3) The two slits are replaced by a single slit whose width is exactly 60 µm.

1.On a spacecraft, two engines are turned on for 542 s at a moment when the velocity of the craft has x and y components of v_0x = 2960 m/s and v_0y = 5010 m/s. While the engines are firing, the craft undergoes a displacement that has components of x = 3.31 x 10⁶ m and y = 4.76 x 10⁶ m. Find the (a) x and (b) y components of the craft's acceleration.

2.A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 690 m/s. The gun is pointed directly at the center of the bull's-eye, but the bullet strikes the target 0.028 m below the center. What is the horizontal distance between the end of the rifle and the bull's-eye?

3.A golf ball rolls off a horizontal cliff with an initial speed of 14.0 m/s. The ball falls a vertical distance of 12.7 m into a lake below.(a) How much time does the ball spend in the air? (b) What is the speed v of the ball just before it strikes the water?

4.A rocket is fired at a speed of 85.0 m/s from ground level, at an angle of 38.0

I understand how electrons initially move into another's vicinity, but nowhere can I find a fathomable answer to this. Also, does the pairs forming 'a condensate' mean a Bose-Einstein condensate?

A spherical object has an outside diameter of 60.0cm . Its outer shell is composed of aluminum and is 2.80cm thick. The remainder is uniform plastic with a density of 720kg/m3 .

A) Determine the object's average density.

B) Will this object float by itself in fresh water?

An object with a density of 761.0 kg/m³ and a mass of 1399.0 kg is thrown into the ocean. Find the volume that sticks out of the water. (use ?_seawater = 1024 kg/m³)

Describe how at least one of the laws of thermodynamics relates to your room, or the heating or cooling of your room and Comment on three ways to improve the efficiency of your room.

True or Flase, preferably explain the reasoning behind the answer

a)The electric field inside the solid metal sphere is never zero

b)If the solid sphere is an insulator (instead of metal) with net charge Q, the charges are wherever they were placed, and cannot move around.

c) If the solid sphere is an insulator (instead of metal) with net charge Q, the electric field for r >> R would be the same as that of a conductor with the same shape and charge.

d)The net charge on the inside of the solid metal sphere is neutral.

e)The electric field for the metal sphere at r << R will be the same as the field of a point charge, Q, at the origin

f)The electric field near the metal surface on the outside is parallel to the surface.

List the 8 different types of simple machines. The 8th one is harder and less obvious.

Six similar boxes (A–F) are initially sliding in the positive direction along a frictionless horizontal surface at a speed of 10 m/s. Then a net horizontal force, also in the positive direction, is applied to each box for a period of 10 seconds. The masses of the boxes and the net horizontal force for each case are given below.

Rank the boxes in order of increasing FINAL momentum. That is, put first the box with the smallest final momentum, and put last the box with the largest final momentum.

If B is smallest, then A, C, D, and finally E is largest, enter BACDE.
Note: if final momenta are equal, then enter those cases in the order listed.

A) F = 30 N. . . . . . M = 15 kg
B) F = 80 N. . . . . . M = 10 kg
C) F = 70 N. . . . . . M = 15 kg
D) F = 75 N. . . . . . M = 15 kg
E) F = 95 N. . . . . . M = 25 kg
F) F = 110 N. . . . . . M = 10 kg