课程名称︰从夸克到黑洞 课程性质︰通识A7:物质科学领域 课程教师︰黄伟彦 开课学院： 开课系所︰ 考试日期（年月日）︰101/6/20 考试时限（分钟）：90分钟 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : Problem 1: Many scientists recognized Descartes as the father of "modern scinece",by the belief that every thing should follow from (1)and(2). The discovery from Joseph von Fraunhofer of (3) in the rainbow had the impact of being able to study the stars. This is one good example of modern science.(10%) Problem 2: An astriod hitting the Earth would spell the end of our world. Try to estimate the loss of the kinetic energy, mass*velocity**2/2, for an astroid of size of one kilometer in diameter. Try to use the typical astroid velocity. Convert everything to the cgs(cm-gram-second) system and the final unit in kinetic energy would be in ergs. A severe car accident would be to stop a one-ton car with a speed of 200km/hour. This exercise just gives you some feeling of the severe situation. How could you stop the mother Earth from such disaster?(10%) Problem 3: What is the Zeno Paradox? These days we know that there is the quantum law at around 10^(-8)cm (one anstron;the atom size) to 10^(-13)cm(one Fermi; the size of a nucleus)- the strange quantum law. Try to state the modern version of the Zeno paradox in view of the quatum law. (20%) Problem 4:What is the underlying reason that pushed Einstein in searching for the general relativity?(20%) Problem 5:The distance of Vega from us is twenty-six something years if traveled by the light(the fastest in this world). In the class, I argue that it only takes the astronaut about three months to get there. The professor seems to be joking, is that so? Explain.(20%) Problem 6:There are lots of very smart people mentioned in this course. Could you name more than five and the reasons why you name him/her?(20%) --

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