You toss a ball straight up at 6.8 m/s ; it leaves your hand at 2.0 m above the floor. suppose you had tossed a second ball straight down at 6.8 m/s (from the same place 2.0 m above the floor). when would the second ball hit the floor?

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

How would a small bar magnet be oriented when placed at position x?

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.