Q1. A boat with a flat bottom and its cargo weigh 6000N. The area of the boat's bottom is 4m squared. How far below the surface of the water is the boat's bottom while it is floating in the water?
Q2. A parallel-plate capacitor is charged to an electric potential of 337 V by moving 3.95×1016 electrons from one plate to the other. How much work is done in charging the capacitor?
Q3. At 20°C the carbon resistor in an electric circuit connected to a 6.0 V battery has a resistance of 300. What is the current in circuit when temperature of carbon rises to 90°C?