The magnetic field of a plane-polarized electromagnetic wave moving in the z-direction is given by B equals 1.2 cross times 10 to the power of negative 6 end exponent sin open square brackets 2 straight pi open parentheses straight z over 240 minus fraction numerator straight t cross times 10 to the power of 7 over denominator 8 end fraction close parentheses close square brackets in SI units. Find the average power per square meter carried by the EM wave.

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

How can you increase the strength of an electromagnet?