A flashbulb contains 2.4 × 10-4 mol of O2 gas at a pressure of 1.9 atm and a temperature of 19°C. What is the volume of the flashbulb in cubic cm?

Two charges, +4µC on the left and -9µC on the right, are separatedby 30cm.

1. What is the magnitude and direction of the electric force actingon the -9µC charge?





2. What is the magnitude and direction of the electric fieldmeasured at a point 10cm to the right of the +4µC charge?






3. At what point in space will the electric field due to thesecharges be zero?







4. What is the sign and magnitude of the electric potential at apoint 10cm to the right of the +4µC charge?






5. How much work would it require to separate these two charges toan infinite distance?


6. A disposable camera has a 1.5-V battery with an internalresistance of 5000?. To prepare for usage of the flash, the batterycharges a capacitor of 30mF.

a.) How long will it take the capacitor to charge up to 1.35V, 90%of the battery’s EMF?







b.) How much energy is stored in the capacitor when it holds thefull 1.5V of the battery?







7. The shutter switch disconnects the capacitor from the battery,and places it across a flashbulb with resistance of 100?.

a.) How long will it take for the capacitor to release 50% of itsstored energy through the flashbulb?







b.) What was the average power burned by the resistor over thattime?

An ideal gas at 1 atmosphere and 200 K has a volume of 400 cm^3.The gas is warmed to 300 K and pressure increased to 2 atm. What isthe new volume of the gas?
100 cm^3
200 cm^3
300 cm^3
400 cm^3
500 cm^3