相對論部分
1.The total power radiated by the sun is about 3.83 x1026 Watts.How many kilograms of protons and electrons are transformed into helium every second?Note:For a fusion reaction the fraction of mass converted to energy is about 0.007.
2.The mass of the Sun is about 1.99 x1030 kilograms.If we assume this is all hydrogen and about one tenth (0.1) is in the core,how long will the sun burn?Enter your answer in years (use yr as the unit for years).Hint:Calculate the number of seconds the Sun will last and then divide by the number of seconds in a year to get years.For comparison,the Earth is about 4.5 x109 yr old.
3.The average male in the US has a mass of about 88 kg.Interestingly,it is theoretically possible to squash the average male into a black hole.It is also possible,but extremely unlikely,that this could happen spontaneously.For curiosity,what is the Schwarzschild radius of a black hole made from a male who started with a mass of 86 kg?
4.General Relativity says that acceleration in one direction is like gravity in another direction.We experience this when we accelerate in a car and the acceleration pushes us back into the seat.A high performace car like the Cadillac CTS 3.6L Automatic does 0-60mph in approximately 6.4 s.That corresponds to an acceleration of 4.19 m/s2.How many "g"s would this feel like?Data:1 g = 9.81 m/s2