Which of the following is not associated with van der Waals bonds?
(a) Fluctuating- electric dipoles
(b) Electron transfer
(c) Permanent- electric dipoles
(d) Relatively low melting temperature
(b) Electron transfer
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What is the approximate mass-to-light ratio for the inner region of the Milky Way Galaxy, in units of solar masses per solar luminosity?
A) 1000 B) 600 C) 100 D) 6 E) 0.1
Temperature variation of different parts of a person's body can be detected by analyzing the emission pattern of which type of electromagnetic radiation?
a. microwave b. infrared c. ultraviolet d. x-rays
What do we call it when a planet moves backward (east to west) through the stars?
A. retrograde motion B. the Zodiac C. prograde motion D. regression
A uniform rod (mass = 2.0 kg, length = 0.60 m) is free to rotate about a frictionless pivot at one end. The rod is released from rest in the horizontal position. What is the magnitude of the angular acceleration of the rod at the instant it is 60° below the horizontal?
a. 15 rad/s2 b. 12 rad/s2 c. 18 rad/s2 d. 29 rad/s2 e. 23 rad/s2