Which statement about moons is incorrect?

Moons orbit planets.

Moons orbit asteroids.

Moons are natural satellites.

Moons never have an atmosphere.

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

What was the first instrument to ever record an earthquake?

What can you increase the strength of an electromagnet by