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An ice hockey puck slides along the ice at 12 m/s . A hockey stick delivers an impulse of 4.0{\rm kg \cdot m/s} causing the puck to move off in the opposite direction with the same speed. what is the mass of the puck?
A man at point A directs his rowboat due north toward point B, straight across a river of width 100 m. While the man is crossing the river, what is his velocity relative to the shore
A cylinder with moment of inertia 18.8 kg m2 rotates with angular velocity 7.85 rad/s on a frictionless vertical axle. Show that energy is lost in this situation by calculating the ratio of the final to the initial kinetic energy
A star of mass 1.85×1031 kg and diameter 8.20E+9 m rotates with a period of 27.0 days. what is the new diameter of the star
In an experiment performed at the bottom of a very deep vertical mine shaft, a ball is tossed vertically in the air with a known initial velocity of 10.0 m/s, calculate the depth of the shaft
A man does 4,735 J of work in the process of pushing his 2.70 103 kg truck from rest to a speed of v, over a distance of 25.0 m. determine the horizontal force exerted on the truck
q1. a 60 m ladder leans against a wall. what is the minimum force of friction essential to prevent the ladder from
A proton, initially traveling in the +x-direction with a speed of 5.50×10^5m/s , enters a uniform electric field directed vertically upward. After traveling in this field for 4.02×10^7s
Two equally charged, 1.00 {\rm g} spheres are placed with 2.00 {\rm cm} between their centers. What is the magnitude of the charge on each sphere
Two lenses, one converging with focal length20.0cm and one diverging with focal length? 11.5cm , are placed 25.0?cm apart. Determine the magnification of the final image formed
A siphon tube is filled with gasoline and closed at each end. One end is inserted into a gasoline tank 0.15 m below the surface of the gasoline. What is the corresponding rate of flow of the gasoline
a parcel of land held by the partnership as an investment (basis $3,000), and equipment with a basis of $6,000. Illustrate what is her basis in the land and equipment?
To withstand "g-forces" of up to 10 g's, caused by suddenly pulling out of a steep dive, fighter jet pilots train on a "human centrifuge." at what speed is the rider moving when she experiences 10 g's
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