A hypothetical planet has a radius of 500km and acceleration due to gravity of 3.0m/s². What is the gravitational acceleration 100km above it's surface? What is the mass of the planet

What is tan(61)? а. 1.80 b. 0.49 c. 0.61 d. 0.87

Is it possible to use the energy from two atoms colliding to create a clean burning lasting fuel source with a large amount of force? is it also possible to harness that energy from the two atoms colliding to create a clean energy source that will last for years from just two atoms colliding. is there a possibility to control and store that energy for years but slowly let the energy out enough to power cities cheaper and faster.

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle