Q. The minimum distance required to stop a car moving at 36.0 mi/h is 45.0 ft. What is the minimum stopping distance for the same car moving at 67.0 mi/h, assuming the same rate of acceleration?
Q. The emissivity of tungsten is 0.350. A tungsten sphere with a radius of 1.19 is suspended within a large evacuated enclosure whose walls are at a temperature of 285.0 . What power input is required to maintain the sphere at a temperature of 2500.0 if heat conduction along the supports is neglected?