A string is stretched with a tension of 100 N. The string has a length of 2.00 meters. The velocity of wave propagation along the string is 220 m/s. The mass of the string is
A. 3.75 gm.
B. 4.13 gm.
C. 4.66 gm.
D. 5.21 gm.
E. 5.74 gm.
B. 4.13 gm.
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Optical density is directly proportional to
A) mass density. B) light speed. C) index of refraction. D) index of reflection.
Two bodies with masses m1 and m2 are both moving east with velocities of magnitudes v1 and v2, where v1 is less than v2 . The magnitude of the velocity of the center of mass of this system of two bodies is
a. less than v1. b. equal to v1. c. equal to the average of v1 and v2. d. greater than v1 and less than v2. e. greater than v2.
The crust of Mars is much thinner than the crust of Earth
a. True b. False Indicate whether the statement is true or false
Population II stars contain about _____ atoms heavier than helium
A) 0.1 percent B) 0.5 percent C) 1.1 percent D) 2.3 percent