The core of a star must reach a temperature of degrees celsius for hydrogen fusion to begin.
10,000
100,000
1,000,000
10,000,000
100,000,000

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change? work power gravitational energy chemical energy

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. (refer to the walk-through video to locate the online lab within the online textbook).

Diamond will scratch quartz. true or false