"Be ye therefore followers of God, as dear children; and walk in love, as Christ also hath loved us."—Ephesians v.
Fig. 33.—DIAGRAM EXPLAINING THE FLIGHT OF A KITE.
841. Why does the kite-string feel hot when running through the hand?
Because the rapid friction sets free the latent heat of the string, attracts the heat of the hand to the spot where the friction occurs, and sets free the latent heat of the air, which follows the string through the hand, and is compressed by the friction.
842. Why does running with the kite cause it to rise higher?
Because it increases the force with which the wind strikes upon the surface of the kite. If a person were to run with a kite at the rate of five miles an hour, through a still air, the effect would be equal to a wind flying at the rate of five miles an hour against a kite held by a stationary string.