A car travels 20 km west, then 20 km south. what is the magnitude of its displacement?

A) 0 km

B) 20 km

C) 28 km

D) 40 km

T/F climate can change quickly

Which of the following situations is an example of change in momentum? a. a tennis ball hit into a net b. a helium ballon rising up into the sky c. an airplane flying through scattered clouds

This force is involves the attraction between charged particles

If force and displacement are in opposite directions, will work be positive or negative?

Which factors affect the resistance of a material? Check all that apply. length currer thickness temperature voltage

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.