When we say that electrically charged particles in the atmosphere cause lightning, we mean 'cause' in the sense of a: Group of answer choices Necessary but not a sufficient condition. Necessary and a sufficient condition. Relative and an absolute condition. Relative but not an absolute condition. Sufficient but not a necessary condition.

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?