A man standing on a weighing machine in a lift records his weight in the machine as under: (i) w1 when the lift acceleration upwards at 5 m/s2 (ii) w2 when the lift acceleration downwards at 5 m/s2 (iii) w3 when the lift moves up at 5 m/s (iv) w4 when the lift moves down at 5 m/s Which of the following gives a correct relation between their relative values. (a) w1 > w2 > w3 > w4 (b) w1 = w2 > w3 > w4 (c) w1 w3 = w4 < w1

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.