Density: Concrete is sold by the cubic yard. What is the mass, in kilograms, of 1.00 cubic yard of concrete that is 5.00 times as dense as water? (1.00 m = 1.094 yd, a cubic meter of water has a mass of 1000 kg, and density is mass per unit volume.)
A. 764 kg
B. 6550 kg
C. 2420 kg
D. 8730 kg
E. 3820 kg
Answer: E
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Indicate whether the statement is true or false
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Traveling waves are created on a rope that has a mass per length 0.200 kg/m that is stretched with a tension of 400 N
If the end of the rope is moved up and down with simple harmonic motion with amplitude 30.0 cm and a period 1.40 s, how much work is done in one period of the motion? A) 133 J B) 400 J C) 267 J D) 11.3 J E) No work is done because the tension pulls outward along the rope, but the end of the rope moves perpendicular to the rope.