What are fossil fuels, as organic compounds, made from?

hydrocarbons

halogens

polyethylenes

metals

Describe how to calibrate a candy thermometer

Use the fact that the speed of light in a vacuum is about 3.00 * 108 m/s to determine how many kilometers a pulse from a laser beam travels in exactly twelvehours.

You are playing catch with a friend in a moving train. When you toss the ball in the direction the train is moving, how does the speed of the ball appear to an observer standing at rest outside the train?

What are the three types of boundaries and what landforms come from each

What is the correct order of the planets in the solar system

Dark matter has been detected by its

The catcher catches a. 5 kg baseball traveling at 40 m/s and the glove is pushed back 10 cm. What average force did the catcher put on the ball?

Describe the climate and name the climate zone at alaska; portland, oregon; and key west, florida.

If a river is 20 feet wide in nature and needs to be scaled to one-tenth its real size, how wide should it be in a model?

A sample has a density of 30 g/ml. there is 60 ml of this substance. how much does it weigh?