PLS ANSWER FAST WILL GIVE Explain to me in YOUR own words, how convection currents create a cycle? In other words, tell me how heat and cooling create a cycle.

Write a question about how changing temperature affects the gas inside the sports ball

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative

If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.