Richard and Brooke's teacher tells them to place 30 marbles in an 8-inch baking pan to make a model. She tells them that each marble represents a water molecule in the liquid state. Then she asks them to move their model to show what happens to the liquid water molecules when heat is added. What do Richard and Brooke do to show this?

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

He viscosities of several liquids are being compared. all the liquids are poured down a slope with equal path lengths. the liquid with the highest viscosity will

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.