Venus has a high albedo because its surface is covered by
A) light-colored rocks.
B) snow.
C) clouds.
D) dust storms.
E) volcanic ash.
C
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Photoelectric Effect: Light with a wavelength of 310 nm is incident on a metal that has a work function of 3.80 eV. What is the maximum kinetic energy that a photoelectron ejected in this process can have? (1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A. 0.62 × 10-19 J B. 0.21 × 10-19 J C. 0.36 × 10-19 J D. 0.48 × 10-19 J E. 0.33 × 10-19 J
What does the Greenhouse Effect cause?
A. It shields us from the Sun's ultraviolet rays. B. It protects the surface of Earth from cosmic rays. C. It causes Earth's surface and atmosphere to be warmer than they would be otherwise. D. It is the main source of Earth's oxygen.
A parallel plate capacitor is charged to voltage V and then disconnected from the battery. Leopold says that the voltage will decrease if the plates are pulled apart. Gerhardt says that the voltage will remain the same. Which one, if either, is correct, and why?
a. Gerhardt, because the maximum voltage is determined by the battery. b. Gerhardt, because the charge per unit area on the plates does not change. c. Leopold, because charge is transferred from one plate to the other when the plates are separated. d. Leopold, because the force each plate exerts on the other decreases when the plates are pulled apart. e. Neither, because the voltage increases when the plates are pulled apart.
The vertical axis (Y-axis) of the Hertzsprung-Russell Diagram is labeled with _______________
Fill in the blank(s) with correct word