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Suppose that a billiard ball approaches a rail at a speed of 15 m/s and an angle od 60 degrees but rebounds at a speed of 10 m/s and an angle of 50 degrees. What is the change in momentum now? (Hint: use components)
A woman stands on a scale in a moving elevator. Her mass is 53.0 kg, and the combined mass of the elevator and scale is an additional 815 kg. What does the scale read during the acceleration
A bucket of mass 1.70kg is whirled in a vertical circle of radius 1.55m . At the lowest point of its motion the tension in the rope supporting the bucket is 21.0N. Find the speed of the bucket
A point source of light is submerged 2.5 m below the surface of a lake and emits rays in all directions. What is the maximum radius that this circle could have
A K+ ion and a Cl ion are directly across from each other on opposite sides of a membrane 8.9 nm thick. What is the electric force on the K+ ion due to the Cl ion? Ignore the presence of other charges. What direction will it go in relation to the ..
You stand at the center of a carousel spinning at rate w. You throw a ball horizontally with some velocity v from height h. How long does it take for the ball to hit the ground?
Consider a person on the moon who launches herself into a satnding broad jump at 45 degrees. What is the range of the jump
A swimmer, capable of swimming at a speed of 0.8 m/s in still water (i.e., the swimmer can swimwith a speed of 0.8 m/s relative to thewater), starts to swim directly across a 3.0 km wide river. However, the current is 0.91 m/s,and it carries the s..
A steam locomotive uses the back-and-forth motion of a drive rod to turn its 1.45 m diameter wheel. What's the rod's oscillation frequency when the train is moving at 30 m/s
Take element Z = 70 from the periodic table. Ionize it 69 times so that there is only one electron left orbiting around the nucleus. What is the ground state energy of the electron?
Suppose that protons are fired towards the large flat side of a charged conducting plate. How long does it take for the particles to hit the plate
A satellite moves in a circular orbit around the Earth at a speed of 5680 m/s. Determine the period of the satellite's orbit
A movable piston having a mass of 7 kg and a cross-sectional area of 6 cm2 traps 0.17 mol of an ideal gas in a vertical cylinder. The piston slides without friction in the cylinder. The outside of the cylinder is kept at atmospheric pressure, 1.01..
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