With the third CoVid wave coming in the winter, Philopater doesn't think it's safe on Earth anymore. So he volunteers with NASA so he can be sent to the International Space Station (ISS). As soon as Philopater arrives locks all of the other scientists in their sleeping quarters and fires the ISS's rockets so that it will move from it's place in Low Earth Orbit to a place between Earth and the Moon where their gravitational forces cancel each other out and and he can safely wait until the Earth is free of CoVid-19. How far from the Earth's center did Philopater take the ISS? O 3.4 x 10^8 m O 1.6 x 10^8 m O 4.4 x 10^8 m O 8.7 x 10^8 m

With the third CoVid wave coming in the winter, Philopater doesn't think it's safe on Earth anymore. So he volunteers with NASA so he can be sent to the International Space Station (ISS). As soon as Philopater arrives locks all of the other scientists in their sleeping quarters and fires the ISS's rockets so that it will move from it's place in Low Earth Orbit to a place between Earth and the Moon where their gravitational forces cancel each other out and and he can safely wait until the Earth is free of CoVid-19. How far from the Earth's center did Philopater take the ISS? O 3.4 x 10^8 m O 1.6 x 10^8 m O 4.4 x 10^8 m O 8.7 x 10^8 m

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter7: Gravity

Section: Chapter Questions

Problem 14PQ: Since 1995, hundreds of extrasolar planets have been discovered. There is the exciting possibility...

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The Planck time is the unique interval of time that can be built out of G, c, and h. Some physicists think that time intervals shorter than the Planck time have no meaning. Using G = 6.7 x 10-11 kg-1 m3 s-2, c = 3 x 108 m s-1, and h = 6.6 x 10-34 kg m2 s-1, calculate the Planck time, in units of 10-43 s.
A star has an element in its atmosphere that normally emits a line of frequency fs = 7.5 x 10^14 vib/s. If astronomers measure the frequency of this line to be fo = 7.7 x 10^14 vib/s, then how fast are the Earth and this star traveling relative to each other? Remember that the correct equation for the speed v is given by v = [(fo^2 - fs^2) / (fo^2 + fs^2)] c Remember fo^2 means "fo squared."
Since 1995, hundreds of extrasolar planets have been discovered. There is the exciting possibility that there is life on one or more of these planets. To support life similar to that on the Earth, the planet must have liquid water. For an Earth-like planet orbiting a star like the Sun, this requirement means that the planet must be within a habitable zone of 0.9 AU to 1.4 AU from the star. The semimajor axis of an extrasolar planet is inferred from its period. What range in periods corresponds to the habitable zone for an Earth-like Planet orbiting a Sun-like star?
A black hole is a blackbody if ever there was one, so it should emit blackbody radiation, called Hawking radiation. A black hole of mass M has a total energy of MC2, a surface area of 16πG2M2 / c4 and a temperature of hc3 /16π2kGM. Imagine a black hole in empty space, where it emits radiation but absorbs nothing. As it loses energy, its mass must decrease; one could say it "evaporates." Derive a differential equation for the mass as a function of time, and solve this equation to obtain an expression for the lifetime of a black hole in terms of its initial mass.
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