Sunlight, wind, and running water are essentially "free." Yet renewable energy sources are a very small part of our energy consumption. Why is this?

If an elephant is chasing you in a straight line, its mass is threatening but if you zigzag, you have an advantage why?

White light is composed of all the colors of the visible light spectrum. The spectrum is usually said to consist of A) red, blue and green B) red, yellow, blue and green C) red, orange yellow, green, and blue D) red, orange yellow, green, blue, and

When a TV is turned on, electrical energy from the wires inside the wall are transferred in many ways.

Which of the following is not true about the sun

A 1.0kg ball is thrown into the air with an initial velocity of 30m/s. How much potential energy does the ball have when it reached the top of its ascent?

A balloon was partially filled with helium gas at room temperature. It occupied 4.0 liters of volume at 700.0 mm Hg atmospheric pressure. When the balloon was released, it traveled upward until it burst at 99 mm Hg atmospheric pressure.

A packing crate rests on a horizontal surface. It is acted on by three horizontal forces: 600 N to the left, 200 N to the right, and friction. The weight of the crate is 400 N.

Which type of radiation has the lowest penetrating ability?

For which one of the following situations will the path length equal the magnitude of the displacement? a A ball on the end of a string is moving in a vertical circle. b A toy train is traveling around a circular track.

A poem on the body system