The brightest color in sunlight is
A) red.
B) yellow.
C) yellow-green.
D) green.
E) violet.
Answer: C
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What evidence is there to prove that there has been no tectonic movement on Mars?
a. The meteorites that have landed on Earth b. The "blueberries" found by rover Opportunity c. The huge size of the Martian volcanoes d. The presence of ice beneath the surface e. The large number of polygonal cracks on the surface
Pluto's density is most similar to
A) the terrestrial planets. B) the jovian planets. C) moons of the jovian planets. D) Mercury, but nor Venus, Earth, or Mars. E) Saturn, but not Jupiter, Uranus, or Neptune.
Current measurements of the density of the universe support the prediction of the theory of inflation that the universe should be flat
Indicate whether the statement is true or false
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.