1. 320 g of an unknown substance loses 750 J of thermal energy causing its temperature to drop by 3^oC. What is the specific heat of this substance?
2. You have 3 kg of plastic, which has a specific heat of 1230 J/kg^oC. If 13000 J of thermal energy is added to the glass and it starts at a temperature of 5^oC, what is its final temperature?
3. You are cooking pasta in a pot of water. Please describe all of the heat transfer mechanisms that are responsible for the cooking of the pasta.
4. A large fish pond is 1.5 m deep, which can be drained by a valve located at the bottom. The valve is initially closed and the pool is full to the top with water that is not moving. What is pressure at the location of the valve? When the value is opened what is the speed of the water as it exits the pond? Assume that the level of the pond is not changing.
5. A string is vibrating at a rate of 650 Hz. You note that the distance between repeating points on the wave in the string is 0.5 cm. What is the velocity of the wave?
6. A 0.76 kg mass hangs from a spring with a spring constant of 650 N/m. The other end of the spring is tied to the ceiling. The mass is tugged downward by 0.12 m from its equilibrium position and let go such that mass now oscillates about the equilibrium position.

• What the period of the oscillation?
• If the mass is instead tugged downward by 0.24 m from its equilibrium position, discuss how the period of the oscillation would change.

it will be great if it is on a paper written down.