Electromagnetic induction occurs when:

A) electromagnets are induced in a wire.
B) electrons are induced in a magnet by a moving wire.
C) current is induced in a wire by a moving magnet.
D) a magnetic field is induced into a coil of wire by a magnet.

Which of the following is not am example of a polymer? protein nylon kevlar concreta

What was the first instrument to ever record an earthquake?

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)