Helioseismology maps of rotation in the Sun's interior show that its internal gases rotate with equal periods
a. True
b. False
Indicate whether the statement is true or false
False
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Estimate the thermal conductivity of platinum at -10ºC if its electrical conductivity is 6 x 10^7 mhos/m, based on the Wiedemann-Franz law. Note: 1 mho = 1 amp/volt = 1 coulomb/volt-s, 1 W = 1 J/s = 1 volt-coulomb/s.
What will be an ideal response?
Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In this case,
A) Galaxy 1 must be twice as big as Galaxy 2. B) we are seeing Galaxy 1 as it looked at an earlier time in the history of the universe than Galaxy 2. C) we are seeing Galaxy 1 as it looked at a later time in the history of the universe than Galaxy 2. D) Galaxy 2 must be twice as old as Galaxy 1.
RC Circuits: A charged capacitor is connected in series with a resistor and an open switch. At time t = 0 s, the switch is closed. Which of the graphs below best describes the charge Q on the capacitor as a function of time t?
A. A B. B C. C D. D E. E
This diagram represents a person's local sky. What does the red semicircle represent?
A) the horizon B) the meridian C) the zenith D) the celestial equator