A ________ happens when a single high-mass star explodes.
A. Pulsar
B. Type Ia supernova
C. Nova
D. Type II supernova
E. None of these choices is correct.
Answer: D
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Projectile Motion: Which of the following statements are true about an object in two-dimensional projectile motion with no air resistance? (There could be more than one correct choice.)
A. The speed of the object is constant but its velocity is not constant. B. The acceleration of the object is +g when the object is rising and -g when it is falling. C. The acceleration of the object is zero at its highest point. D. The speed of the object is zero at its highest point. E. The horizontal acceleration is always zero and the vertical acceleration is always a non-zero constant downward.
"Seeds" around which galaxies, clusters and walls grew may have been ___________ before inflation and recombination
a. caused by hot dark matter b. caused by baryons c. the result of the separation of the electromagnetic and weak forces d. the result of freezing water molecules shortly after the Universe became transparent to photons e. caused by initially tiny quantum mechanical fluctuations in space-time
During the full moon phase, how much of the illuminated portion of the Moon's surface is visible from Earth?
What will be an ideal response?
To estimate the distance in kilometers of a flash of lightning, count the number of seconds between seeing the flash and hearing the accompanying thunder, then divide by
A) 2. B) 3. C) 4. D) 5. E) none of the above