Explain why leaves and plants are the colors they are, not black or white
What will be an ideal response?
Leaves selectively absorb and reflect different parts of the spectrum of light from
the Sun.
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Series/Parallel Circuits: For the circuit shown in the figure, R1 = 5.6 ?, R2 = 5.6 ?, R3 = 14 ?, and ? = 6.0 V, and the battery is ideal.(a) What is the equivalent resistance across the battery?(b) Find the current through each resistor.
What will be an ideal response?
Retrograde motion is discernible by watching a planet over the course of
A. a few minutes. B. many years. C. many nights. D. many hours.
If the orbit is elliptical, rather than circular, what can be said about the work done by the Sun on Earth?
a. It does not matter whether the orbit is circular or elliptical, no work is done. b. If the orbit is elliptical, work is done to speed up or to slow down Earth, depending on its location in orbit. c. Whether the orbit is circular or elliptical, work must be done to propel Earth around the Sun. d. The work the Sun does on Earth accounts for Earth's changes of season. e. The work the Sun does on Earth causes the tides.
Rank the following media in order according to the speed of light in them, from slowest to fastest: vacuum, air, water and glass
a. air, water, glass, vacuum b. glass, air, water, vacuum c. water, glass, air, vacuum d. glass, water, air, vacuum e. none of the above