The stack of books on the left has a mass of 15 kg. What is the approximate mass of the stack of books on the right?

Anybody wanna ? (picture included? )

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

State the following: boyle's law and charle's law