Aperson accidentally drives a car off a bridge, and the car sinks to the bottom of a shallow river at 20 ft. if the car is modeled as hermetically sealed and the area of the car door is 10 ftº, what is the force required to open the door?

An electric kettle is made out of stainless steel, weighs two pounds (when empty) and is equipped with a heating element that consumes 2 kw of electricity. assuming that the water and the kettle are at the same uniform temperature at any moment of time, calculate the shortest possible time to bring 2 quarts of water from room temperature to the onset of boiling