Based on its surface temperature of 5,800 K, what color are most of the photons that leave the Sun's surface?
A) blue
B) red
C) yellow
D) orange
E) green
E
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Estimate the maximum rotational energy (in electron-volts) for a free and freely-spinning diatomic hydrogen molecule in the L = 2 quantum state
The equilibrium separation for the atoms in the H2 molecule is 0.075 nm. (1 eV = 1.60 × 10-19 J, mproton = 1.67 × 10-27 kg, h = 6.626 × 10-34 J ? s) A) 0.044 eV B) 0.011 eV C) 0.022 eV D) 0.033 eV
Of the known planets in our solar system, the innermost is Mercury. When compared to the other planets in the system, Mercury has:
a. the greatest centripetal acceleration. c. the smallest speed. b. the greatest period of revolution. d. none of the above properties.
A car traveling along the highway brakes to a stop. A greater braking force is required when the car has
A) more mass. B) more momentum. C) less stopping distance. D) all of the above E) none of the above
The Mesozoic era began about how many million years ago?
a. 3 b. 545 c. 245 d. 65