Anegative charge in a cloud induces a positive charge in the ground below the cloud. the charges gradually increase. then the air itself becomes charged and forms a pathway for electrons to travel. a flash of lightning occurs. what is the term for this occurrence? a. static discharge b. friction c. induction d. contact force

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up

The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes with the propane (c3h8) to burn it completely. for every gram of propane that flows through the burner, what volume of air is needed to burn it completely? assume that the temperature of the burner is 195.0°c, the pressure is 1.05 atm, and the mole fraction of o2 in air is 0.210.

If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.