Given this schematic diagram of a defective eyeball, which of the lenses shown can correct for this defect?
A. a
B. b
C. c
D. d
E. e
A. a
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A solenoid of radius 1.1 cm produces a magnetic field at its center is 0.28 T. What is the magnetic flux through the center of the solenoid?
a. 
b. 
c. 
d. 
e. 
Electrostatic discharge that usually occurs during a thunderstorm
A. Waterspout |
B. Tropical Cyclones |
C. Tornado |
D. Lightning |
E. Great Red Spot |
F. Dust Devil |
The most accurate way to determine the surface temperature of a star is to study
a. the pattern of absorption lines from various atoms. b. the relative intensities of light measured through different photometric filters. c. the peak wavelength of the star's continuous blackbody spectrum. d. pattern of emission lines that are on the star's spectrum.
Which mysterious phenomena do scientists attribute to dark energy?
A: The increasing rate of expansion of the universe. B: Mysterious bonding that holds atoms together. C: The creation of the cosmic microwave background. D: The formation of Helium through nucleosynthesis. E: Dark energy causes ALL of the above.