If there is 8 g of a substance before a physical change, how much will there be afterwards?

0g

4g

8g

16g

Which describes the characteristics of a liquid? a. It has no fixed volume or shape. b. It has a fixed volume and shape. c. It has high energy and expands to fill the container. d. It has a fixed volume and varied shape.

Is the melting of an ice cube considered a physical change or a chemical change? Explain your reasoning.

A cart on an air track is moving at 0.5m/s when the air issuddenly turned off. THe cart comes to rest in 1m. The experimentis repeated with the cart moving at 1 m/s when the air is turnedoff.

What type of waves are sound waves, and how do they transfer energy?

An apple fell 4 m from the top of the tree to the ground in 0.9 s. what was its average speed? a. 3.6 m/s b. 4.0 m/s c. 4.4 m/s d. 4.5 m/s down

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.