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A cosmic ray electron moves at 7.75 x 106 meter per second perpendicular to the earth's magnetic field at an altitude where field strength is 1 x 10-5 T. Obtain the radius of the circular path the electron follows?
A hydraulic jack is made by a small piston 1.3 cm in diameter that is utilized to move a large piston 6.1 cm in diameter. If a man can exert a force of 360 N on the small piston, how heavy a load can he lift by the jack?
A 2.0 kg block starts from rest on the positive x axis 3.0 m from the origin and thereafter has an acceleration given by a = 4.0 i -3.0 j in m/s2. At the end of 2.0 s its angular momentum about the origin is?
A car is parked at the top of a 50 {\rm m}-high hill. It slips out of gear and rolls down the hill. How fast will it be going at the bottom
A 0.80 kg body oscillates on a spring that, when extended 3.0 mm from equilibrium, has a restoring force of 5.0 N. find the angular frequency of oscillation
A guitar string is 90 cm long and has a mass of 3.8g. What are the frequencies of the fundamental and first two overtones
a 80 kg student traveling in a car with a constant velocity has a kinetic energy of 1.9 x 104 j. what is the
A 22 kg box is released on a 34.0° incline and accelerates down the incline at 0.271 m/s2. How large is the coefficient of friction
You are holding a bulletin board weighing 8.68 N in place against a wall while your friend secures it to the wall. How large must this force be if the coefficient of static friction with the wall is 0.42
A 1000 Hz sound travels through pure oxygen. The wavelength of the sound is measured to be 0.65m. What is the speed of sound in oxygen?
a 741 kg stopped at a intersection is rear ended by a 1580kg truck moving at 17.5 m/s. Find final speeds of both vehicles
A baseball player slides into second base during a steal attempt. Assuming reasonable values for the length of the slide, estimate the average force of friction acting on the player
A car moving with an initial speed v collides with a second stationary car that is 49.0 percent as massive. Calculate the final speed of the second car
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