If you were on Venus instead of on the Earth, using principles of general relativity, would you expect the Sun to appear redder or bluer? Why?
According to Mach's principle how would the rotation of objects differ in a universe with less matter in it? Explain how measurable quantities such as centripetal force, angular momentum, and moment of inertia would change, if at all.
A flashbulb is set off in the center of a car on a moving train. Light sensors on the front and rear walls of the car record the light emitted by the flash bulb. Describe how the light would illuminate the walls of the car as observed by an observer on the train and an observer standing next to the tracks on the ground. Explain the observations.
Solar neutrino deficit is an astrophysics problem. In short the fusion of hydrogen atoms into helium releases neutrinos, which are subatomic particles. The problem is that only one-third of the necessary number of neutrinos is measured. You can solve this problem if the neutrinos are changing their form while traveling between the Sun and the Earth. If they are changing form what are the implications with regard to their velocity? What are the implications with regard to their mass? Justify your answers.
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