Describe the general types of interactions that contribute to the collision stop- ping power, (dTl&),.

Describe three different methods for the detection exoplanets.

For each method, explain what type of exoplanet is the method most sensitive for detecting?

i.e. large vs. small, close in vs. far out from its host star, cold vs. hot, massive vs. low mass

A cannon on a train car fires a projectile to the right with speed v0, relative to the train, from a barrel elevated at angle θ. The cannon fires just as the train, which had been cruising to the right along a level track with speed vtrain, begins to accelerate with acceleration a, which can be either positive (speeding up) or negative (slowing down). Find an expression for the angle at which the projectile should be fired so that it lands as far as possible from the cannon. You can ignore the small height of the cannon above the track.

Two planets P1 and P2 orbit around a star S in circular orbits with speeds v1 = 42.6 km/s, and v2 = 56.0 km/s respectively.

(a) If the period of the first planet P1 is 780 years what is the mass, in kg, of the star it orbits around?

(b) Determine the orbital period, in years, of P2.

1. Imagine a bar magnet, with North and South poles, moving in the direction perpendicular to a single loop of wire on the horizontal plane, as shown below.   Show the directions of current induced in the coil using arrows and explain why.

a. Magnet moving toward the coil.

b. Magnet moving away from the coil.

3. Geodesics in R² : Consider 2D flat space in polar coordinates r and θ. Find the curves parametrized by r(s) and θ(s) that satisfy the geodesic equation, and show that they correspond to straight lines in R²

Friction lab Analysis: 1. HOW I CAN Construct a graph of friction vs Normal force. Can I plot both Static and Kinetic friction on a single Excel Graph and how. 2. How can I use this graph to find the coefficient of static and kinetic friction? (Hint: Think about how we found mass in the Newton’s second law experiment)

An 8.00-cm-long piece of wire is formed into a square, and carries a clockwise current of 0.150 A. The loop is placed inside a solenoid, and the plane of the loop is perpendicular to the solenoid’s magnetic field. The solenoid carries a counterclockwise current of 17.0 A, and has 25 turns per centimeter. What is the force on each side of the loop?

Please explain

Compare the passage of charged and uncharged particles through matter. What are the approximate probabilities of a single charged particle achieving a path- length equal to twice its range, or of a single photon having a pathlength twice as great as the mean free path lip? (Assume the photon is totally absorbed in its first interaction.)

Its a video of a glider pushed forward and going back due to a fan blowing of the opposite direction of being pushed.

After watching this video, Blake, a student in an introductory physics class, makes the following claim:

The acceleration and velocity of the glider are both momentarily zero when the glider changes direction. The velocity of the glider must be zero for an instant when the glider changes direction. Because the velocity is zero, the acceleration must also be zero.

Respond to Blake's claim. Which parts, if any do you agree with, and which parts do you not agree with? To support your response, use evidence from your experience, or from the videos in this activity.

A series circuit contains a 3.00 H inductor, a 3.00

A γ-ray which has energy of 400 keV collides with an atom and undergoes Compton scattering.

(a) What is the energy of the wave in Joules and hence what is its frequency?

(b) If the change in the angle of the γ-ray is 20°, what is the frequency of the wave as it exits the atom?

In Aluminium, the attenuation of a γ-ray is described by the attenuation coefficient μ=0.25 cm-1. What are the values for the following:

(c) The relaxation length

(d) The half value thickness

(e)The amount of attenuation of 3 cm of Aluminium, assuming the buildup factor is 1.

1. Look up “heat engines” on the Internet. There will be a lot of technical discussion meant for engineers. Can you find any novel heat engines? Look up “nitinol engine.” Can you find heat engines that claim to work on small temperature differences? Do they discuss the poor efficiency that you get with small temperature differences (from the efficiency equation)?