When mixing 2 or more substances together, evidence that a chemical change occurred would NOT include? 20 POINTS 1.(producing a gas)
2.(change in color)
2.(change in shape)
3.(change in temperature)

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

An object's buoyant force and weight mean the same thing. a. trueb. false

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?