Consider a two-step process. Heat is allowed to flow out of an ideal gas at constant volume so that its pressure drops from 3.3 atm to 1.8 atm. Then the gas expands at
constant pressure, from a volume of 4.5 L to 9.7 L, where the temperature reaches
its original temperature.
a) Sketch the PV diagram for this process.
b)calculate the work done by the gas in the process
c) Calculate the changes in the internal energy of the gas in the process
d) Calculate the heat flow into or out of the gas

The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0∘ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30∘ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45∘ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60∘ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90∘ with the plane of polarization?

If a balloon is taken outside on a very cold day, what will occur?

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?