What is the order of star colors with increasing temperature?
a. Red, Yellow, Blue
b. Blue, Red, Yellow
c. Red, Blue, Yellow
d. Yellow, Red, Blue
e. Blue, Yellow, Red
A
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Consider some material that has been cooled until it has become a superconductor. If it is cooled even further its resistance will:
a. stay constant and non-zero. c. decrease. b. increase. d. None of these choices.
The two purposes of water in a reactor core are ______
a. neutron absorber and heat transfer liquid b. neutron moderator and heat transfer liquid c. neutron moderator and neutron absorber d. neutron absorber and lubricant e. neutron moderator and radiation shield
Earth doesn't experience a solar eclipse every month because
a. of unpredictable weather patterns. b. the moon always keeps its same side toward the Earth. c. the moon's position is not aligned with the Earth's orbit. d. its sometimes nighttime when the eclipse occurs. e. sometimes the moon is too far away.
An object is placed 9.5 cm from a lens of focal length 24 cm. (a) Where is the image formed? (b) What is the magnification?
What will be an ideal response?