The hottest part of the Sun is
A. the corona.
B. the core.
C. the photosphere.
D. the radiative zone.
Answer: B
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Which of the following critical features of the heliocentric model leads to Venus exhibiting a full range of phases?
A) When Venus is closer to the Sun, it moves faster. B) Venus passes on the far-side of the sun from the Earth's perspective. C) Venus physically distorts from a sphere as it orbits the sun.
What would be the weight of a 59.1-kg astronaut on a planet twice as massive as Earth and having twice Earth's radius?
A) 580 N B) 290 N C) 1160 N D) 118 N E) 1200 N
A diatomic molecule is vibrating in its first excited quantum state above the ground state. In that excited state, its frequency is 2.0 × 1013 Hz
What is the energy of the molecule in this state? (h = 6.626 × 10-34 J ? s, h = 1.055 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J A) 0.12 eV B) 0.15 eV C) 0.041 eV D) 0.17 eV E) 0.083 eV
Consider a uniform hoop of radius R and mass M rolling without slipping. Which is larger, its translational kinetic energy or its rotational kinetic energy?
A) Translational kinetic energy is larger. B) Rotational kinetic energy is larger. C) Both are equal. D) You need to know the speed of the hoop to tell.