How do we know that the universe is getting bigger faster and faster?

A ball is thrown horizontally from a height of 17.3 m and hits the ground with a speed that is 5.00 times its initial speed. what is the speed in the vertical direction just before the ball hits the ground?

Which statement best explains why atoms form chemical bonds with other atoms

If san andreas fault slips 2.5 cm each year how far would it separate in 100 years

List five uses of electromagnets identified in the article. Made-to-Order Magnets.

Why do the planets orbit the sun

When an electron moves from a lower to a higher energy level

Which of the following is all matter made of? A. Hot particles B. Cold particles C. Constantly moving particles D. Nonmoving particles

Which of the following has longest wavelength, a) blue light b) red light c) x-rays d) gamma rays?

are the properties of a specific element the same as the properties of a molecule made up of that element? why or why not

In what circumstance is displacement the same as distance traveled?