Why will it be hard to determine the nature of Venus' interior?
A) No orbiter has been able to find the exact mass of Venus.
B) No seismograph can last long enough at Venus' temperatures to pick up quakes.
C) No photos have ever been returned from Venus' surface.
D) The clouds prevent us from finding the exact diameter and volume of Venus.
E) The magnetic field of Venus is much stronger than our own.
B
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Stars much less luminous than the Sun have
A) wider habitable zones, increasing the odds of finding habitable planets and much longer lifetimes allowing life to appear and evolve B) wider habitable zones, increasing the odds of finding habitable planets but lifetimes too short for life to appear C) narrower habitable zones, decreasing the odds of finding habitable planets and lifetimes too short for life to appear D) narrower habitable zones, decreasing the odds of finding habitable planets but much longer lifetimes allowing life to appear and evolve
It takes 87 J of work to stretch an ideal spring from 1.4 m to 2.9 m from equilibrium. What is the value of the spring constant of this spring?
A) 27 N/m B) 77 N/m C) 52 N/m D) 39 N/m
The order of evolutionary stages of a star like the Sun would be Main Sequence, giant, planetary nebula, and finally
A) hypernova. B) neutron star. C) white dwarf. D) nova. E) black hole.
In the reaction between HCl and Na2CO3, which gas is formed?
a. H2 b. CH4 c. CO2 d. O2