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Just after a big fish swallows a small fish, the momentum of the two-fish system is

A projectile is launched at an angle of 15° above the horizontal and lands downrange. With no air resistance, what other projection angle for the same speed would produce the same downrange distance?

A kilogram is a unit of

If the radius of the Earth somehow decreased with no change in mass, your weight would

A cat and a mouse run along a road with the same kinetic energy. The faster runner is the

If a monkey floating in outer space throws his hat away, the hat and the monkey will both move

If a battleship sinks in a canal lock, the water level in the lock

A bullet fired horizontally hits the ground in 0.5 s. If it had been fired with twice the velocity it would have hit the ground in

Communications and weather satellites always appear at the same place in the sky because these satellites are

With no air resistance, a projectile fired at 50° has the same range as if it were fired at