Aheat engine with a high-temperature reservoir at 400 k has an efficiency of 0.20. what is the maximum possible temperature of the cold reservoir?

Determine the maximum r-value of the polar equation r =3+3 cos 0

In which of the following would the particles move most rapidly? a. ice at -20 °c b. water at 20 °c c. steam at 110 °c d. boiling water e. ice at 0 °c

Which component of the earth’s atmosphere is decreased due to photosynthesis?