Question 4( asap)
a gas with constant temperature has a pressure of 4 atm. this pressure changes to 0.2 atm, causing the volume to increase to 500 l. based on the relationship between pressure and volume, what must have happened to the pressure?

1points
a
pressure decreased.

b
pressured increased.

c
pressure stayed the same.

d
pressure trend can not be determined.

The pressure decreases when the volume is increased given at the constant temperature. Thereby, here in the question, based upon the relationship, the .

option A

Explanation:

According to the Boyle’s law, the pressure and volume are in inverse proportional ratio for their relationship to understand, when the temperature is kept constant at all times for establishing the relationship.

Therefore, as given, pressure decreases from 4 atm to 0.2 atm, which itself shows the decrease, while the volume has increased to 500 L, which must be initially 25 L. According to the equation of Boyle’s law,

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.