During this century, we have found that Newton's physics does not apply to
A) high speed objects.
B) very strong gravitational forces.
C) very small objects.
D) All of the above.
E) Nonsense--Newton's physics always applies.
D
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What is the reactance of a 20-mH inductor at a frequency of 60 Hz?
A) 0.13 ? B) 1.2 ? C) 7.5 m? D) 1.2 m? E) 7.5 ?
Fill in the blank in the following chemical reaction thatoccurs in the Sun:Deuterium+proton=??+ energy:
a) deuterium-2 b) hydrogen-1 c) helium-3 d) carbon-12 e) helium-4
A 0.200-H inductor is connected to a 60.0-Hz 120-V rms source
(a) What is the inductive reactance? (b) What is the rms current to the inductor? (c) If both the inductance and the frequency were doubled, what would be the rms current? What will be an ideal response?
Simple harmonic oscillations can be modeled by the projection of circular motion at constant angular velocity onto a diameter of the circle. When this is done, the analog along the diameter of the acceleration of the particle executing simple harmonic motion is
a. the displacement from the center of the diameter of the projection of the position of the particle on the circle. b. the projection along the diameter of the velocity of the particle on the circle. c. the projection along the diameter of tangential acceleration of the particle on the circle. d. the projection along the diameter of centripetal acceleration of the particle on the circle. e. meaningful only when the particle moving in the circle also has a non-zero tangential acceleration.