34. The pressure of a gas in a cylinder is found using a water manometer. (J2012 PIQIT) to gas cylinder
20 cm
water
The density of water is 1000 kg/m' and the gravitational field strength g is 10 N/kg.
What is the pressure, above atmospheric pressure, of the gas in the cylinder?
.
A 200Pa
B2000Pa C 20000Pa D 200000Pa
C​

explanation:

newton's third law, for every action there is an equal and opposite reaction.

graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.