Why does athlete pushes the earth backward fith his feet and hands just before the race starts

How does the north pole of a magnet respond to the poles of other magnets? A. It attracts both north and south poles. B. It repels both north and south poles. C. It attracts the north pole and repels the south pole. D.

What happens to the sound of a train whistle as a train approaches and passes you? why?

The 1.5-in.-diameter shaft AB is made of a grade of steel with a 42-ksi tensile yield stress. Using the maximum-shearing-stress criterion, determine the magnitude of the torque T for which yield occurs when P = 56 kips.

When the wick is lit, the kerosene in the wick undergoes a chemical reaction with oxygen in the air to release energy in the form of light. Which change to the device would increase the amount of time the lantern provides light?

car slows down from 20 m/s to rest in a distance of 85 m. What was its acceleration, assumed constant?

The process of gathering information through the senses is called what?

Are earths surface is made up of plates the move. And why

What fundamental frequency would you expect from blowing across the top of an empty soda bottle that is 24 cm deep, if you assumed it was a closed tube? The speed of sound in air is 343 m/s.

Is polarization possible for longitudinal waves?

Which of the following is a reason for the start of the space race? Too many scientists were unemployed. Congress was very interested in outer space. The U. S. president was a science fiction fan.