Two blocks of mass mA = 5kg and mB = 7kg are connected by a cable of negligible mass on a pulley. The

pulley rotates on a frictionless axle, the cable doesn’t slip on the pulley, it has a radius r = 4cm and a mass mp = 10g. Block A is on an inclined ramp at an angle θ = 30◦ above the ground and there is a coefficent of

friction μk = 0.12 between block A and the ramp. Block B sits a distance d = 3m from the ground. The system is released from rest and block B descends. Calculate the speed of block B at the instant just before it hits the ground

(a) – 5 pts What is the observational difference between Type I and Type II supernovae? What physically happens during the Type Ia supernova? Why Type Ia supernovae are so important? What is core-collapsed supernova? Can it be Type Ia?

(b) – 5 pts What is called pulsar-wind nebula (PWN)? Describe qualitatively the multiwavelength radiation from PWN. What radiation mechanisms are involved? What energies of particles follow from observational data? What particles produce the observed radiation? How can the particle energies be estimated from observational data?

1) Does the magnetic field outside solenoid depend on the distance from solenoid?

2) How the magnetic field inside solenoid depends on the solenoid diameter?

3) What would happen to the magnetic field inside solenoid if it is bent?

4) Can you identify North and South poles of the solenoid you studied?

5) How can you prove that the magnetic field inside solenoid is uniform?

An opaque cylindrical tank with an open top has a diameter of 2.80 m and is completely filled with water. When the afternoon Sun reaches an angle of 31.2

Three quantities are given: A = 5.0 m3/kg·s 2 , B = 2.0 m/s, and C = 8.0 kg·m2/s. Using dimensional analysis determine the simplest algebraic combination of these three quantities that has the dimensions of length and compute its value in meters (Answer: 2.2 m

Can somebody explain/prove why Kinetic Energy is not conserved in an inelastic collsion?

Explain the basic physical reason why we encode electronic information in only 2 bits (e.g. binary).

A light shines from the bottom of a pool of water that is 65.5 cm deep.

How far away, relative to the spot directly above it, must the beam of light strike the air-water interface in order that the light does not exit the water? cm

A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to 0.400 its original speed.

Part A What is the mass of the second ball?

A 2 kg stone is dropped from a 50-m-tall building. Simultaneously, a second 1 kg stone is thrown horizontally from the building at a speed of 15 m/s, as shown in the figure.

Calculate the x position of the center of mass of the two-stone system the moment after they are set in motion.

Calculate the y position of the center of mass of the two-stone system the moment after they are set in motion.

Calculate the x position of the center of mass of the two-stone system 2 s after they are set in motion.

Calculate the y position of the center of mass of the two-stone system 2 s after they are set in motion.

Calculate the x position of the center of mass of the two-stone system the moment they hit the ground.

Calculate the y position of the center of mass of the two-stone system the moment they hit the ground.

1. a) Explain Einstein’s theories of special relativity and general relativity.

b) Include at least one piece of evidence in support of each theory.

topic: Ballustic Pendulum Lab.
why does the total momentum before the collision include only the momentum of the ball? why is the momentum of the pendulum included?

A 318 g object is attached to a spring and executes simple harmonic motion with a period of 0.270 s. If the total energy of the system is 6.29 J.

(a) Find the maximum speed of the object. (------m/s ?)

(b) Find the force constant of the spring. (--------N/m ?)

(c) Find the amplitude of the motion. (------- m ?)

Speedy Sue, driving at 32.0 m/s , enters a one-lane tunnel. She then observes a slow-moving van 175 m ahead traveling with velocity 5.00 m/s. Sue applies her brakes but can accelerate only at -2.00 m/s^2 because the road is wet. Will there be a collision?

A) Yes or No

B) If yes, determine how far into the tunnel and at what time the collision occurs. If no, determine the distance of closest approach between Sue's car and the van and enter zero for the time.

distance

______m

time

______s

discrete ordinates method for 1-D neutron transport