A 2-m taut string is plucked at its centre producing vibrations with fundamental frequency of 40 Hz, a)Calculate the velocity of the transverse wave propagating in the string.
[ v = 160 m s-1]

b)At what position should the string be plucked to produce vibrations at
frequency 160 Hz?
[ 0.25 m from one end]

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.