A 11.0L gas tank containing 4.00moles of ideal He gas at 20.0?C is placed inside a completely evacuated insulated bell jar of volume 40.0L . A small hole in the tank allows the He to leak out into the jar until the gas reaches a final equilibrium state with no more leakage.

What is the change in entropy of this system due to the leaking of the gas?

delta S = J/K

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

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?

Because atoms of elements in the same group of thbecause atoms of elements in the same group of the periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t fe periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t f