As a person pushes a box across a floor, the energy from the person's moving arm is transferred to the box, and the box

and floor become warm. During this process, energy is

-increased

-conserved

-destroyed

-decreased

Two books are located 1 m above the surface of the Earth. The first has a mass of 2 kg; the second has a mass of 1 kg. Which statement about the pull of Earth's gravity is true? A.

19. The work done by a magnetic field on a charged particle moving in it is: a. Double that in electric field b. half that in clectric field czero d. none of these

which of the following is an example of a compound machine. a. a bicycle chain. b. a coffee mug. c. a paper cutter

In your second paragraph, state why erosion is a problem. Explain how erosion can harm an ecosystem and ruin the value of a natural resource.

What is the name for the duration in which a force is applied? a. Momentum c. Duration b. Impulse d. None of the above

What is the difference between weight and mass? mass and weight are both intrinsic properties of an object. if you multiply the mass of an object by the acceleration due to gravity, you will obtain the object's weight.

A skipper on a boat notices wave crests passing the anchor chain every 5 seconds. the skipper estimates the distance between crests is 15 m. what is the speed of the water waves?

According to this lesson, how many major ice ages has the earth undergone? A. 2 B. 3 C. 4 D. 5

In 2016, the city of Rio de Janeiro had a population density of 5377 people/km2. What was the population density of Rio in people per square meter?

Which kingdom consists only of complex multicellular, eukaryotic organisms which must consume or ingest other organisms for nutrition?