What causes a rolling object

What is the scientific definition of Horizontal component and vertical component. I think Horizontal component is X axis and Vertical component is Y axis. True or False.

Edwin Hubble used a telescope and observed fuzzy blobs of light off in the distance. He realized that these lights were: A. Stars B. Galaxies C. Universes D. Planets

True or False: Continuous reinforcement occurs when a response is reinforced only some of the time.

A digital thermometer reads 15 degrees Celsius, what is the uncertainty?

What is a good concluding thought about what happens to your body if you drink a Coke

A body with v=20m/s changes its speed to 28m/s in 2sec. its acceleration will be

Charge: A piece of plastic has a net charge of + 2.00 μC. How many more protons than electrons does this piece of plastic have? (e = 1.60 * 10-19 C)

How much heat is needed to raise the temperature of 6g of water by 18oC?

A proposed space station includes living quarters in a circular ring 50.0 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth?

Which transformation of energy occurs in a hydroelectric power plant? A. Potential energy to chemical energy B. Chemical energy to potential energy C. Chemical energy to Kinetic energy D. Kinetic energy to electrical energy F.