In order to slide a 70.0 kg box across the floor at a constant speed, you must push horizontally with a force of 351 N. What is the coefficient of kinetic friction?
A. 0.149
B. 0.584
C. 0.337
D. 0.512
E. 0.678
D. 0.512
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What is the total mass of a binary star system with P = 20 yr and a = 10 AU?
a. 2 solar masses b. 2.5 solar masses c. 0.5 solar mass d. 80 solar masses e. 0.4 solar mass
Archimedes' Principle states that...
A. the pressure in a fluid is directly related to the depth below the surface of the fluid. B. an object immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid. C. the velocity of a fluid is directly proportional to the pressure exerted on the fluid. D. the pressure of a fluid is inversely proportional to the temperature of the fluid.
What is the particle referred to as a WIMP?
a. the result of a neutrino oscillation b. a hypothetical particle left over from the Big Bang c. a hypothetical particle in the MOND theory d. none of the above
A series LRC ac circuit has a resistance of 4.0 k?, a capacitance of 33.0 ?F, and an inductance of 23.0 H. If the frequency of the alternating current is 2.0/? kHz,
what is the phase angle between the voltage and the current? A) 23 rad B) -1.6 rad C) 1.5 rad D) 3.1 rad