The ratio of an animal's brain weight to body weight is thought to be roughly proportional to its
A) sex drive
B) height
C) rate of movement
D) intelligence
D
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Four students are talking about the kind of energy that's fundamental to life on Earth. Thomas says it is electrical energy. Susan opts for solar energy. Lawrence argues in favor of chemical energy. Kimberly is sure it's mechanical energy.
Who is correct?
a- Thomas
b- Susan
c-Lawrence
d-Kimberly
What do you expect the spectrum of an object that is 1,000,000 Kelvin to be like?
a) It should give off less total light than the Sun. b) It should peak at violet wavelengths. c) It should peak at X-ray wavelengths. d) It should give off about 10 times more total light than the Sun. e) It should peak at radio wavelengths.
The intensity of unpolarized light passing through a single sheet of polarizing material changes by a factor of:
a. 1. b. 0.5. c. cos ?. d. cos2 ?.
Between the orbits of the planets Mars and Jupiter we find
A) the Oort cloud B) Orion's belt C) the Kuiper belt D) the asteroid belt