Three resistors, 90 ?, 40 ?, and 60 ?, are wired in series and connected to a 120-V battery. What is the equivalent resistance for this circuit?
a. 190 ?
b. 19 ?
c. 0.053 ?
d. 216000 ?
a
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A jet plane travels around the world at 2000 mi/hr (894 m/s). Two accurate atomic clocks measure the times of flight, one on board the plane and the second on Earth. If it takes 12 hours to complete the journey, what will the time difference (in ?s) be?
A. 0.75 B. 0.50 C. 0.25 D. 1.0 E. 0.19
Parallel-Plate Capacitor: Two ideal parallel-plate capacitors are identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitance
A. C/2. B. C. C. 2C. D. 4C.
Different colors correspond to electromagnetic waves of different
A) frequencies. B) speeds. C) amplitudes. D) weights. E) intensities.
The grand unified theory (GUT) would reduce the fundamental forces to
A) 1. B) 2. C) 3. D) 4. E) 10.