Where do stars form in the galaxy today?
A.) No stars are forming in the galaxy today.
B.) In the halo.
C.) In the disk.
D.) Only around the Sun.
E.) B and C.
Ans: C.) In the disk.
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Why do we always see only one side of the Moon?
A. The Moon is tidally locked with Earth. B. The Moon does not rotate. C. The far (opposite) side only faces Earth during the daytime when the Sun's light outshines the Moon. D. From time to time we see all the sides of the Moon from Earth.
Two identical blocks of iron are placed in contact, one at 10°C and the other at 20°C. If the cooler block cools to 5°C and the warmer block warms to 25°C, this would violate the
A) first law of thermodynamics. B) second law of thermodynamics. C) third law of thermodynamics. D) none of the above
A Hubble Constant of H = 70 km/sec/ Mpc suggests a maximum age for the universe of ________
Fill in the blank(s) with correct word
The original nucleus and the final nucleus will be different isotopes of the same element for which decay scheme of the original nucleus?
a. alpha decay followed by two beta (electron) decays b. two gamma decays c. a beta (electron) decay followed by an alpha decay d. a beta (electron) decay followed by neutron emission