In what region of the Sun is solar energy generated?
A) the outer surface
B) the inner surface
C) the mid-interior
D) the inner core
Answer: D
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What prevents Titan from being a candidate for supporting an evolution of life? a. It is too far from the Sun
b. Its atmosphere doesn't contain the right mixture of elements. c. Its surface is covered in methane lakes. d. Its surface temperature is too cold. e. It is tidally locked to Saturn rather than the Sun.
Light of 10 cm wavelength is classified as what type of radiation?
A. 
ray
B. x-ray
C. UV
D. microwave
E. visible
An object is placed 10 cm in front of a mirror, and an image is formed that has a magnification of 2 . Which of the following statements is false?
a. The focal length of the mirror is 20 cm. b. The image is virtual. c. There is enough information to select the correct answer. d. This is the only true statement.
A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5.0 cos (pt). The magnitude of the acceleration (in m/s2) of the body at t = 1.0 s is approximately
a. 3.5 b. 49 c. 14 d. 43 e. 4.3