A 100-W light bulb is left on for 20.0 hours. Over this period of time, how much energy did the bulb use?

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

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

What effects result when there is an impact between earth and an asteroid? check all that apply. a. massive flooding. b. extinction of many life forms. c.major earthquakes change in average global temperature. d. giant dust cloud