10) How many years are required for 028 g of cesium-137 to decay to 3.5 mg given the half- life is 30 y?

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

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1: