What is a number bond.

An observation that requires measurement is called quantitative observable or qualitative

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

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 ?