A Hooke's law spring is mounted horizontally over a frictionless surface. The spring is then compressed a distance d and is used to launch a mass m along the frictionless surface. What compression of the spring would result in the mass attaining double the kinetic energy received in the above situation?
a. 1.41d
b. 1.73d
c. 2.00d
d. 4.00d
a
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An empty spice bottle has an inner volume of 1.31 × 10^?4 m3 . It has a mass of 112 g when filled with air, and it displaces 1.63 × 10^?4 m3 of water when fully submerged. What fraction of the total volume of the bottle will be beneath the surface when it is placed in a tank of water?
a. 0.69 b. 0.81 c. 0.85 d. 1.00 e. 1.46
A 2.0 meter long Aluminum wire (R = 0.44 m?, ? = 2.82 × 10-8 ?-m, ? = 4.29 × 10-3 C-1 ) is connected in series to an 8.0 meter long Tungsten wire (R = 0.20 m?, ? = 5.6 × 10-8 ?-m, ? = 4.5 × 10-3 C-1)
What is the resistance of the combination if the wire is heated to 150.°C? Assume the initial temperature for both wires is room temperature (20°C). A) 0.78 m? B) 0.88 m? C) 0.69 m? D) 1.00 m? E) 0.64 m?
Which answer below is not a statement of the second law of thermodynamics?
a. Real processes proceed in a preferred direction. b. Energy does not flow spontaneously by heat from a cold to a hot reservoir. c. The entropy of the universe increases in all natural processes. d. In theory, heat engines working in a cycle employ reversible processes. e. You cannot construct a heat engine, operating in a cycle that does nothing but take heat from a reservoir and perform an equal amount of work.
Quarks, originally isolated in cosmic ray showers, are elementary particles possessing electric charge equal to 1/3 or 2/3 the magnitude of the charge of a proton