There are only about 118 known elements. How is it possible that all matter in the universe is made up of just over 100 elements?

If a car is traveling on the highway at a constant velocity, the force that pushes the car forward must be A. greater than the force of friction exerted upon the car. B. less than the force of friction exerted upon the car. C.

a heating coil offers a resistance of 2.5 k ohm what voltage is required so that 1.5 a of current pass through it

Example sentence for gravitational potential energy

We drive a distance of 1 kilometer at 18 km/h. then we drive an additional distance of 1 kilometer at 40 km/h. what is our average speed?

Geocentric theory: a. was initially rejected b. was in contradiction to the ideas of Ptolemy c. stated that the sun revolved around the earth d. all of the above

What is the importance of the ozone layer?

Which of the following is an example of plasma?

What do you need to make 100 minutes charges neutral

The equation e = mc2 relates mass and a. energy b. force c. work d. gravity

What should a scientist do to use scientific methods for determining the relative age of Earth's rocks? A be biased in opinion B disregard views of others C use creative ideas D prove that methods are non-testable