The speed of light has been measured to be about miles a second. 186,000 1,000,000 1,100 10,000

Why is nh3 classified as a polar molecule

What is the mass of 8 moles of sodium atoms

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.