Geothermal energy is an alternative energy source. However it is not avaliable enough to replace more than a small amount of the Earth's energy needs. Why is this?

What is the coefficient of kinetic friction μk between the block and the tabletop?

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.

Slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere true or false