Which one of these kingdoms do not move or contain chlorophyll and therefore cannot make their own food.?

Explain why electric current cannot exist if a current doesn't have a voltage source.

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?