In a GUT (Grand Unified Theory), what is "unified"?
A. matter and energy
B. subatomic particles
C. all of space
D. galaxies
E. the fundamental forces
Answer: E
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Waves of amplitudes 0.4 m and 0.3 m interfere while traveling in the same direction with the same speed. If the wavelengths are the same, what are the resulting largest and smallest amplitudes possible?
1.0.7 m and 0.5 m 2.0.7 m and 0.1 m 3.0.5 m and 0.35 m 4.0.5 m and 0.1 m
Atmospheric CO2 levels have reached 400 ppm and global warming is no longer a question—it is a fact. Explain three consequences of this trend in climate change?
What will be an ideal response?
Free Fall: A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and experience no significant air resistance. If the 10-kg rock reaches a maximum height h, what maximum height will the 20-kg ball reach?
A. h/4 B. h/2 C. h D. 2h E. 4h
When comparing geologic time to a calendar year, the time of the dinosaurs is in the
A) middle of October. B) first half of December. C) second half of December. D) first half of February.