How much steam must be condensed into the water

Reference no: EM1384647

Q. A 50.0 g copper calorimeter contains 250-g of water at 20°C. How much steam must be condensed into the water if final temperature of the system is to reach 45°C?

Q. Two automobiles drive in the same direction next to the highway. Each moves initially at speed v = 30 meters per second, (that's 67.11 miles per hour) and the distance between them is D meters.

At time t = 0 seconds, the driver of car in front, car B, sees a deer in the road ahead and slams on his brakes; as a result, car B decelerates at a = 7.2 meters per second squared. The driver of car A immediately hits his own brakes, which decelerate car A at a = 4.5 meters per second squared.

What is the minimum value of D that allows the driver of car A to stop his vehicle before it crashes into other car?

Reference no: EM1384647

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