What is the angle of an inclined surface if the length of the surface is 10 m and the side opposite to the angle is 5 m?

Two identical 82 mg dust particles very far apart (pee 0) are moving directly toward each other at a speed of 3698 m/s. the charge on each is-719 ? c. determine how close they will get to each other. let k = 9x109 n-m2/c2 & ignore gravity.

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.