Acylinder that has an ideal piston contains one mole of hydrogen ( h 2 ) gas and undergoes an isobaric expansion that doubles its initial volume. how much heat is transferred to or from the gasa) heat flows into the gas by an amount greater than the mechanical work ww. b) heat flows into the gas by an amount less than the mechanical work ww. c) heat flows out of the gas by an amount greater than the mechanical work ww. d) heat flows out of the gas by an amount less than the mechanical work ww.

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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.