A 25-kg cactus is dropped from 7 meters. How much gravitational potential energy does that cactus have before it is dropped? (Reminder: g = 9.80 m/s/s)

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

What is the measure of a change in an objects velocity?

In an experiment, how can i change human errors? be specific.