An ac series circuit consists of a voltage source of frequency 60 Hz and voltage amplitude V, a 533-? resistor, and a capacitor of capacitance 6.4-?F
What must be the source voltage amplitude V for the average electrical power consumed in the resistor to be 989 W? There is no inductance in the circuit.
1300 V
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When a wool blanket is used to keep warm, what is the primary insulating material?
a. wool b. air c. the trim around the edge of the blanket d. a thin layer of aluminum foil (usually not apparent) inside the blanket
Work: A 30-N box is pulled upward 6.0 m along the surface of a ramp that rises at 37° above the horizontal. How much work does gravity do on the box during this process?
A. -1100 J B. -110 J C. -140 J D. -180 J E. 120 J
A motor scooter undergoes acceleration when it
A) gains speed. B) decreases speed. C) changes direction. D) all of the above
What is the equivalent resistance between points a and b when R = 13 ??
a.
29 ?
b.
23 ?
c.
26 ?
d.
20 ?
e.
4.6 ?