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Which of the following cannot be determined from the spectrum of a star?

A. The magnetic field of star

B. The tangential velocity of the star

C. The temperature of the atmosphere of the star

D. The density of the star

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Trinidad Tremblay
Trinidad TremblayLv2
5 May 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

5) A neutron star is a burnt out star in which gravitational forcestake over. The gravity condenses all the matter to such an extentthat all protons and electrons fuse together, creating neutrons.Thus, the star consists of one giant nucleus containing onlyneutrons. The neutron star at the center of the Crab Nebula has amass of approximately 1.4 times that of our sun, and a diameter ofonly 12.2 miles. It also spins at a rate of 4.81radians/second.
a) How long does it take for this neutron star to complete onerotation?
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d) The escape velocity of the Earth is about 25,000 miles/hour. Ifa rocket was launched with this velocity from the surface of thisneutron star, how far would it get from the surface?
e) What is the escape velocity for this star? (Calculate it fromfirst principles. Don’t just use the formula. Give your answer inmiles/hour.)
f) At what height would a satellite around this star have to be, inorder to be in a geosynchronous orbit with it?
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Consider a dying star

A. Would a dying star have a larger or smaller proportion ofhydrogen relative to heavier elements as helium and carbon thanwould main sequence stars? Why?
B. Considering that it would have no source of internal energy toprovide the high tempertures and pressures required to support itagainst the force of gravity, which such a star be large or small?Why?
C. Assuming that the mass of a star has not changed much, would thestar's density be low or high? Why?
D. How might this density affect the apperance of the spectrum?Why?
E. In view of the size and lack of energy source for the star,would it have low or high luminosity? Why?

A certain white dwarf star was once an average star like our Sun.But now it is in the last stage of its evolution and is the size ofour Moon but has the mass of our Sun.
A)Estimate the gravity on the surface of this star?
B)How much would a 69- person weigh on this star?
C)What would be the speed of a baseball dropped from a height of3.0 when it hit the surface?

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