Molar Specific Heats: How much heat is required to raise the temperature of 2.00 moles of an ideal monatomic gas by 10 C° at constant volume? (R = 8.31 J/mol ? K).
A. 249 J
B. 416 J
C. 208 J
D. 200 J
E. 125 J
Answer: A
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One of the first atomic bombs released energy equivalent to that of 20,000 tons of TNT explosive. How much mass was converted to energy by this explosion, given that 1000 tons of TNT produce 4.3 × 1012 J of energy
Incidentally, modern H-bombs have energy yields 1000 times as much! (c = 3.0 × 108 m/s)
The Sloan Digital Sky Survey includes many thousands of galaxies in its spectroscopic catalogs. How are the distances to most of these galaxies estimated?
A) from their redshifts and the application of Hubble's Law B) by measuring Cepheid variable light curves C) by measuring their parallax angle as the Earth circles the Sun D) by measuring the light from white dwarf supernovae
Which planets have densities similar to that of Earth's?
A. Uranus and Neptune B. Mars and Mercury C. Pluto and Charon D. Jupiter and Saturn
In a double slit experiment, if the separation between the two slits is 0.050 mm and the distance from the slits to a screen is 2.5 m,
find the spacing between the first-order and second-order bright fringes when coherent light of wavelength 600 nm illuminates the slits. A) 1.5 cm B) 3.0 cm C) 4.5 cm D) 6.0 cm E) 9.0 cm