Waves carry energy through empty space or through a medium without transporting matter. While all waves can transmit energy through a medium, certain waves can also transmit energy through empty space. A medium is a material through which waves can travel. It can be a solid, liquid, or gas.
Given that a shape is a parallelogram, the answer that is sufficient to state that it is also a rectangle is that C. The opposite sides are parallel. A is not enough - this would mean it is a square, not a rectangle.
<span>Which of the following is the correct unit for time when calculating power in watts? </span> The correct unit for time when calculating power in watts is seconds. The answer is letter D. The rest of the choices do not answer the question above.