You can hear a difference between these two sounds. That is because their pitch isdifferent. Pitch depends on the frequency of a sound wave. ... High sounds have highfrequencies and low sounds have lowfrequencies.
The reason wearing multiple thin layers will keep you warmer than a single thicker layer is because warm air is trapped between the layers acting as an insulator. If you were then to remove a layer you would reduce the amount of heat trapped which would cool you down.
The answer is focal point.
The focal length is the distance from the lens (or mirror) to the focal point. The focal point is <span>the point at which rays of light converge.</span>
Nope Copper is a better conductor