During which physical change does the potential energy of the particles decrease?

A

Liquid to gas

B

Liquid to solid

C. Solid to gas

D

Solid to liquid

A mechanical wave generally does NOT A. move through a medium. B. move the medium from one place to another. C. move through solids. D. disturb the medium.

When you move from place to place, how do you know you moved?

A kangaroo hops at an angle of 25° to the horizontal with a velocity of 20 m/s. What is the vertical component of the velocity? A. 8.5 m/s B. 12.5 m/s C. 18 m/s D. 20 m/s

What is the average mass of a neutron? A. 1 amu B. 1,837 amu C. 1/1,837 amu

The spiral review which of the following represents 7 + 7 + 7+7

What trends were seen in Mendeleev's periodic table?

Through which medium would EM waves travel the fastest? A. The Ocean B. The Atmosphere C. Rocks

Average mass of a toy car (small, hot wheels) ?

A cannon directed straight upward launches a ball with an initial speed v. The ball reaches a maximum height h in a time t. Then, the same cannon is used to launch a second ball straight upward at a speed 2v.

Does the sun fuse hydrogen into helium or vice versa?