A satellite is in a circular orbit about the Earth at a distance of two Earth radii above the surface. What is the speed of the satellite? (The radius of the Earth is 6.4 × 10^6 m, and G = 6.67 × 10^-11 N × m2/kg2.)
a. 2800 m/s
c. 5600 m/s
b. 4600 m/s
d. 16,800 m/s
B
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The power dissipated in an RLC series circuit is dependent upon:
A. the impedance B. the capacitive reactance C. the inductive reactance D. the resistance
If a wave has a frequency of 12 Hz, it has a period of
a. 1/12 s. b. 3.5 s. c. 144 s. d. 12 s.
Which of the following correctly describes the situation when Jackie returns to Earth? (Ages in this problem refer to biological ages—that is, how much time has passed for each sister since she was born.)
A) It's the year 2050, and both twin sisters are 70 years old. B) It's the year 2050. Gwen (who stayed home) is 70 years old, but Jackie is only a little older than her age of 20 when she left. C) It's the year 2050. Gwen is 70 years old. Jackie is 19. D) It's the year 2100. Gwen and Jackie are both 120 years old. E) According to Gwen, Jackie returns to Earth in the year 2050, but according to Jackie, she returns in the year 2001.
The most important properties of polymers are their low ______________and their high corrosion resistance. 22. In high-strength
Fill in the blank(s) with the appropriate word(s).