4. A driver initially at rest accelerates her 2000 kg car to a final velocity of 30 m/s. owT E a. What is the kinetic energy of the car at her final velocity?

1 - Consider 2 kg of water in a cylinder blocked by a piston at 20 C, 200 kPa. Water is heated and piston starts to rise. When the piston reaches the blocks, the volume of water has doubled. Heating continues until the pressure also doubles. Calculate the work done by water and the amount of heattransfer. Consider the case that the piston is restricted by the linear spring. Initially the spring is at rest. Water is heated until the piston reaches the blocks. Just before it hits the blocks the pressure is twice the initial pressure. Calculate the work done by water and the amount of heat transfer by the time the piston reaches the blocks. 7 D H₂0

3. A gas expands from the states V₁ = 1 m³ and P₁ = 40 Pa to V₂ = 3 m³ and P₁ = 15 Pa along path B in the PV diagram below. Then this gas is compressed back to V₁ either through paths A or C. How much work, total internal energy, and heat is done by the gas along paths (A) OBCO and (b) OBCO