1. A piston cylinder assembly contains air with an internal energy of 36 kJ/kg. It is compressed to a higher pressure with the work of 16 kJ and the final internal energy is 84 kJ/kg. During compression there is a heat loss 1520 J. What is the mass of the air?

Q: Food in microwave is heated by   A. conduction   B. Neither.   C. Radiation   D. convection

A: Food in microwave is heated by   A. conduction   B. Neither.   C. Radiation…

Q: What is the energy needed to melt 0.52 kg of gold? (Use: Lf of gold = 63 kJ/kg) Select one: a. 0.64…

A: Required The energy needed to melt gold.

Q: Which of the following substances would make the best thermal conductor? а. Wood b. Glass С. Brick…

A: Given substances are - Wood Glass Brick Aluminum Wool

Q: What criteria and constraints are important considerations when designing a thermos

A: Important criteria  : It should be properly insulated using a good insulator so that there is no…

Q: Explain difference/distinction between heat and energy?

A:

Q: Explain why temperature does not change during a phase change

A:

Q: Decide which physical states are indicated in the following statement.  Choose all that apply.…

A: Solid, liquid, and gas are three states of matter. In our daily life w observe and use these states…

Q: Explain why temperature doesn’t change during a phase change.

A: Temperature is a measure of the average kinetic energy of a substance’s particles. To put it another…

Q: Heat is transfer of energy due to -2 difference in a- time O b- volume O c- pressure O d-…

A: Heat energy is the result of the movement of tiny particles called atoms, molecules, or ions in…

Q: 5. Hence show that: OU (hvexp(-ßhv)) hv exp(-2ẞhv) =-3Nhv + οβ (1-exp(-ẞhv)) (1-exp(-Bhv)) Hint 1:…

A:

Q: Which of the following substances would make the best thermal conductor? a. Aluminum b.…

A: to choose : The best thermal conductor out of aluminum , wool , glass , wood and brick