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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?
Block A weighs 19.9 lb and is moving toward the left with a velocity of 4 ft/s just before it is struck by the bullet B from a caliber 50 machine gun. The coefficient of kinetic friction between A and the plane is 0.25. The bullet weighs 0.10 lb a..
Earth has a net charge that produces an electric field of approximately 150 N/C downward at its surface. find the magnitude and sign of the excess charge
An object with a mass of 48.0 g displaces 605.0 ml of water when it is completely immersed. What is the buoyant force on the mass
A 542 Hz sound wave travels through a substance. The wavelength of the sound wave is measured to be 1.9 meters. What is the speed of sound in the substance
A plane move through the air. This results in the air under thewing moving at speed v=50 m/s. what is the lift exerted on the plane in Newtons
What is the minimum diameter mirror on a telescope that would allow you to see details as small as 4.85 km on the moon some 384000 km away
Tom and Mary are riding a merry-go-round. Tom is on a horse about half way between the center and the outer rim, Which child has the larger angular speed
An 8.70 block slides with an initial speed of 1.56 down a ramp inclined at the angle of 23.6 with the horizontal. The coefficient of kinetic friction between the block and the ramp is 0.69.
Describe the displacement of the airplane when the radar was tracking it-RBA=RB-RA. What are the components of RBA.
So a bike went 10m in 4 seconds and the acceleration was constant the whole way. What Was the instantaneous velocity at 5m? If it helps the whole race was 1000m
If the intensity of the electromagnetic radiation produced by the Sun is about 1.4 kW/m2 near the Earth, what size would a sail have to be to accelerate a spaceship with a mass of 11.9 metric tons at 1.39 m/s2
Light from a laser (? = 640 nm) passes through a diffraction grating and spreads out into three beams as shown in the figure. Determine the spacing between the slits of the grating
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