Voltage can also be called
a. potential
b. pressure
c. work
d. energy
e. none of the above
A
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Which of the following statements is true of green grass?
A) It absorbs red light and reflects green light. B) It absorbs red light and emits green light. C) It transmits all colors of light except green. D) It means the lawn is healthy.
An asteroid exerts a 360-N gravitational force on a nearby spacecraft. The 360-N force on the spacecraft is directed
A) toward the asteroid. B) away from the asteroid. C) toward the Sun.
Light with a frequency of 8.70 × 1014 Hz is incident on a metal that has a work function of 2.80 eV. What is the maximum kinetic energy that a photoelectron ejected in this process can have?
(1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s) A) 8.7 × 10-19 J B) 3.1 × 10-19 J C) 1.3 × 10-19 J D) 2.4 × 10-19 J E) 4.5 × 10-19 J
A current-carrying 2.0-cm long segment of wire is inside a long solenoid (radius = 4.0 cm, n = 800 turns/m, current = 50 mA). The wire segment is oriented perpendicularly to the axis of the solenoid. If the current in the wire segment is 12 A, what is the magnitude of the magnetic force on this segment?
a. 22 mN b. 16 mN c. 18 mN d. 12 mN e. 0 mN