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After the collision, the 80.0-g puck moves in a direction that makes an angle of 45.0° with the original direction of motion and the 100-g puck moves at an angle of 12.0° in the opposite dir
Two ice skaters push off against one another starting from a stationary position. The 45-kg skater acquires a speed of 0.375 m/s. What speed does the 60-kg skater acquire?
Consider a 1.0 kW fuel-cell assembly operating at 50% efficiency. (a) How many litres of water does it produce per hour? (b) If its fuel is natural gas (CH4), what fraction of a cubic meter does it
The final velocity of train car B is 2.0 m/s traveling East. What is the final velocity of train car A? Or does it come to complete stop after the collision?
Calculate the speed of a proton that is accelerated from rest through an electric potential difference of 158 V.
When you last stopped, you noticed that the snow was coming down vertically, but it is passing the windows of the moving car at an angle of 30 degrees to the horizontal. Estimate the speed of the sn
Suppose that you take another 0.4 s to realize your danger and begin braking. If you too brake at 5 m/s2, what is your speed when you hit the police car?
(a) What must be the magnitude of the resulting constant deceleration if a collision is to be just avoided?
(a) Find the speed of the block just as it leaves the spring. (b) Find the total distance the block will slide. (c) Describe all of the energy transformations and/or transfers that occur during this
A mixture of ordinary hydrogen atom and tritium, a hydrogen isotope whose nucleus is approximately 3 times more massive than ordinary hydrogen, is excited and spectrum is observed . How far in wavel
The gas first expands isobarically until the volume doubles. Then it expands adiabatically until the temperature returns to its initial value. Assume that the gas may be treated as an ideal gas with
You connect both ends of a copper wire, with a total resistance of 0.10 O, to the terminals of a galvanometer. The galvanometer has a resistance of 845 O. You then move a 10.0-cm segment of the wire
An electron and a positron can rotate about their center of mass as if they were a dumbbell connected by a massless rod. What is the orbital frequency for an electron and a positron 1.20 nm apart?
If the sail material has a density of 600.0 kg/m3, what is the maximum thickness of the sail for which the force due to radiation pressure exceeds the gravitational force on the sail?
(a) At a point on the rope a distance r from the end that is held, what is the tension F? (b) What is the speed of transverse waves at the is point? (c) Find the time required for a transverse wave
The bullet has a mass of 3.00g and the rod rotates around its center. Right after the collision its has ω = 10.0 rad/s. What was the speed of the bullet before it hit the rod?
The current through the solenoid increases by 21.21 A. The permeability of free space is 1.25664 × 10-6 N/A2. By how much does the magnetic flux through the solenoid change? Answer in units of &
A point charge q1 = -2.0 C is at the origin, and a second point charge q2 = +5.4 C is at the point x = 1.3 m, y = 3.0 m. (a) Find the x and y coordinates of the position at which an electron would be
A lens having a focal length of 20.8 cm is used as a simple magnifier. (a) what is the angular magnification obtained when the image is formed at the normal near point (q= -25.0 cm)?
Initially the cockroach and disk rotate together with an angular velocity of 0.200 rad/s. Then the cockroach walks half way to the center of the disk. (a) What then is the angular velocity of the co
A softball of mass 0.220 that is moving with a speed of 7.1 collides head-on and elastically with another ball initially at rest. Afterward the incoming softball bounces backward with a speed of 3.4
A 5 gram cart is released from rest 1 meter from the bottom of a frictionless, 30 degree ramp. The cart rolls down the ramp and bounces off a rubber block at the bottom.
When we rotate the polarizer, does the intensity of the reflected ray change? Which kind of polarization takes place here? Why? Please use your best judgment when answering this question.
A yo-yo has a rotational inertia of 900 g·cm2 and a mass of 100 g. Its axle radius is 3.3 mm and its string is 100 cm long. The yo-yo is thrown so that its its initial speed down the string i
A 78 RPM record player, playing a 12 inch diameter spins up in 1.5 seconds, if a bug at the edge has sticky feet (us = 0.8), at what point in time does the bug slip off the record?