If the current in an inductor is doubled, by what factor is the stored energy multiplied?
1.4
2.2
3.1
4.1/2
5.1/4
1
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Which of the following statements is not a prediction of the general theory of relativity?
A) Time runs slightly slower on the surface of the Sun than on the surface of Earth. B) The Universe has no boundaries and no center. C) The curvature of spacetime can distort the appearance of distant objects. D) Different observers can disagree about the fundamental structure of spacetime. E) A binary star system with two stars orbiting each other rapidly emits gravitational waves.
According to Newtonian physics, an object with no forces acting on it must
A) be accelerated, with an unchanging acceleration. B) either be at rest or have constant velocity. C) eventually come to rest. D) be at rest. E) fall.
A 95 N force exerted at the end of a 0.50 m long torque wrench gives rise to a torque of What is the angle (assumed to be less than 90°) between the wrench handle and the direction of the applied force?
A) 18° B) 14° C) 22° D) 25°
A 30. kg child stands at one end of a floating 20. kg canoe that is 10. ft long. The child walks to the other end of the canoe. How far does the canoe move in the water assuming water friction is negligible?
A) 10. ft B) 4.0 ft C) 6.0 ft D) 8.0 ft E) 2.0 ft