Imagine comparing a 1.2 solar mass white dwarf to a 1.0 solar mass white dwarf. Which of the following must be true?
A) The 1.2 solar mass white dwarf has a higher surface temperature.
B) The 1.2 solar mass white dwarf has a smaller radius.
C) The 1.2 solar mass white dwarf has a larger radius.
D) The 1.2 solar mass white dwarf is supported by neutron degeneracy pressure; the 1 solar mass white dwarf is supported by electron degeneracy pressure.
E) The 1.2 solar mass white dwarf has a lower surface temperature.
B
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If 40 kcal of heat is added to 2.0 kg of water, what is the resulting temperature change?
A) 80C° B) 60C° C) 40C° D) 20C° E) 0.05C°
Two spectral lines in a spectrum have frequencies of 2.0 x 1014 Hz and 4.6 x 1014 Hz. A higher-frequency line in the same spectrum likely has a frequency of
A) 2.6 x 1014 Hz. B) 6.6 x 1014 Hz. C) 13.2 x 1014 Hz. D) none of the above
______________, lava, and pyroclastics are the three general products emitted during a volcanic eruption
Fill in the blank(s) with correct word
Charge of uniform density (20 nC/m2) is distributed over a cylindrical surface (radius = 1.0 cm), and a second coaxial surface (radius = 3.0 cm) carries a uniform charge density of ?12 nC/m2 . Determine the magnitude of the electric field at a point 2.0 cm from the symmetry axis of the two surfaces
a. 2.3 kN/C b. 1.1 kN/C c. 1.7 kN/C d. 3.4 kN/C e. 4.5 kN/C