A term for electric pressure is
A) current.
B) voltage.
C) electric resistance.
Answer: B
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Which portion of the electromagnetic spectrum is used in a television?
a) infrared waves b) X rays c) radio waves d) gamma waves
A GUT (grand unified theory) refers to theories that
A) unify the electromagnetic and weak forces. B) unify the strong force and the electromagnetic and weak forces. C) unify all four forces. D) unify gravity and the electromagnetic and weak forces. E) unify gravity and the strong and weak forces.
The radioactivity in wastes from nuclear reactors decays away quickly
What will be an ideal response?
A fire fighter tightens the nut on the top of a fire hydrant using a large wrench. If she applies a force of 250N perpendicular to the wrench, at a point 0.75m from the axis of rotation of the nut, how much work does she do on the nut as she rotates it through 
?
A. 190 J B. 150 J C. 290 J D. 130 J