When water of mass m and specific heat c is heated from absolute temperature T1 to absolute temperature T2, its change in entropy is
a. cm ln(T2/T1)
b. cm (T2/T1)
c. cm (T2 ? T1)/T1
d. cm (T2 ? T1)/T2
e. cm (T2 ? T1)/(T2 + T1)
a
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The rotation of the Sun's photosphere is
a. fastest at the equator, slower at mid-latitudes, and slowest near the poles. b. slowest at the equator, faster at mid-latitudes, and fastest near the poles. c. fastest at the equator, slowest at mid-latitudes and the poles which travel at the same speed. d. the same regardless of latitude.
Astronomers before Shapely underestimated the size of the Milky Way galaxy because they lacked telescopes
a. True b. False Indicate whether the statement is true or false
The excited state of a certain atom is 3.2 eV ± 0.21 eV
(a) What is the average lifetime of this state? (b) If the excited energy doubled (6.4 eV ± 0.21 eV) how would the lifetime be affected?
What type of exoplanet observation allows unambiguous determination of the exoplanet's mass and radius? Can this be done with most exoplanets?
What will be an ideal response?