When a 5 kilogram mass is

raised vertically

2 meters from the ground, what is its gain in potential energy?

A magnet is useful in generating electricity because a magnetic force moves a) Protons b) neutrons c) electrons d) metal atoms

What happens when a negatively charged object A is brought near a neutral object B? A Object B gets a negative charge B. Object B gets a positive charge. Cobject B stays neutral but becomes polarized. D. Object Agets a positive charge.

What did young's observation of an interference pattern for light show about the nature of light? A. light consists of particles B. light behaves as waves C. the speed of light is constant D. light travels at extremely high speed

It takes eight minutes for light to travel to the closest star from the sun. True False

Which statement describes an essential characteristic of data in an experiment?

given that a car's distance from a stop sign t seconds since it started moving is represented by d=t2-2t determine the car's average speed over each interval of elapsed time

A ball hits a wall. What is true about the magnitude of the force experienced by the ball compared with the force experienced by the wall? OA. The ball experiences more force than the wall. OB. The ball experiences less force than the wall.

A swimmer jumps from a waterfall thats is 8.5 m high from the lake below. How fast must he run horizontally to dive 2.5m away from the base of the waterfall?

What happens (as far as energy goes) when a molecule of gas strikes the wall of a container?

The boom of a fire truck raises a fireman (and his equipment - total weight 280 lbf) 60 ft into the air to fight a building fire.