Which is a good example of a contact force? A. protons in the nucleus of an atom B. a ball falling down after it's thrown up into the air C. a satellite orbiting Earth D. a bat hitting a ball

Geothermal energy for industrial use is available almost anywhere. a.true b.false

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

Which of the following is the best name for a compound made from calcium and bromine? (cabr2) calcium bromide calcium dibromide monocalcium dibromide calcium bromine ii