If the mass of the Sun were cut in half, how would the force between the Sun and theEarth change?

a) it would quadruple
b) it would double
c) it would remain unchanged
d) it would decrease by a factor of four
e) it would decrease by a factor of two

Answer: e) it would decrease by a factor of two

Physics & Space Science

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Because of the period-luminosity relation for Cepheids and RR Lyrae variable stars, astronomers are able to _____

a. determine the relationship between the period of pulses and luminosity b. measure the mass of a star c. calculate a star's diameter d. determine the chemical composition of a Type I Cepheid e. narrow their study to eclipsing binary stars only

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Physics & Space Science

Which of the following represents one of the major splits in physical science before and after about 1895?

The loss of the feeling that everything in nature could be understood through reasoning with the introduction of quantum mechanics after about 1895. With the explanation of blackbody radiation in 1887, after 1895 the world worked towards modeling quantum mechanics. The ether was found to exist and was generally accepted after about 1895 as the electromagnetic medium. Both matter and light appeared to be best modeled by a wave rather than a particle after about 1895.

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Physics & Space Science

What shows directly that there is a nuclear force?

a. The fact that electrons congregate around the nucleus. b. The fact that nuclei can lose nucleons. c. The relatively large mass of protons and neutrons compared to the electrons. d. The fact that electrons can change shells around the nucleus. e. The fact that so many nuclei are stable and hold together despite the repulsion between their positive charges.

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Physics & Space Science

Which planet has a ring system?

A) Neptune B) Jupiter C) Saturn D) Uranus E) All of the above

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Physics & Space Science