This constantly moving system circulates warm water from the equator to the Poles and cold water from the Poles to the equator:

The discovery that the universe appears to be expanding led to a widely accepted theory called a.) the big bang theory b.) the doppler effect c.) hubble’s law d.) solar nebular theory e.) the seyfert theory

What are similarities and differences of reflection, refraction, diffraction and absorption?

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.