If Star A is closer to us than Star B, then Star A's parallax angle is ________
A) fewer parsecs than that of Star B B) hotter than that of Star B
C) smaller than that of Star B D) larger than that of Star B
D
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When a vapor condenses,
A) the temperature of the substance increases. B) the temperature of the substance decreases. C) heat energy leaves the substance. D) heat energy enters the substance.
Process of Science: Devise an experiment that would produce evidence (not necessarily proof) that Earth is round. You may use any technology you like, but you may not leave Earth (i.e., no satellite photos and no space travel)
Be as creative as you like there are many right answers.
A 1-N-falling apple hits the ground with a force of
A) 1 N. B) 2 N. C) 4 N. D) 10 N. E) not enough information
An electron with a speed of 2.0 × 10^6 m/s moves into a uniform electric field of 325 N/C that is parallel to the electron's motion. How long does it take to bring the electron to rest? (me = 9.11 × 10^-31 kg, e = 1.6 × 10^-19 C)
a. 3.5 × 10^-8 s c. 2.3 × 10^-8 s b. 2.3 × 10^-6 s d. 1.2 × 10^-7 s