Colors are barely seen or not at all in nighttime because moonlight
A) has almost no colors in it.
B) is too dim to activate the retina's cones.
C) photons don't have enough energy to activate the retina's cones.
D) is primarily yellow light.
E) is only semi-transparent in Earth's atmosphere.
Answer: B
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Approximately how long after the Solar System formed did it take for oxygen to get to within 80 percent of its present abundance in Earth's atmosphere?
a. 4 billion years b. 1 billion years c. 400 million years d. 1 million years e. Oxygen was always a primary component of Earth's atmosphere.
The gravitational potential energy of a system
1.depends on the reference configuration for zero potential energy. 2.is always positive. 3.is always negative. 4.is none of these.
If the specific heat capacity of water were lower than it is, a watermelon in a picnic cooler would cool in a
A) shorter time. B) longer time. C) the same time anyway.
Briefly explain diffraction fringes
What will be an ideal response?