A series LR circuit dissipates 60 W. The circuit is powered by a 120 V rms 60 Hz supply. If the current is 2.0 A rms, what is the inductance?
A. 0.10 H
B. 0.15 H
C. 0.20 H
D. 0.25 H
E. 0.30 H
B. 0.15 H
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A sample of helium occupies 44.8 L at STP. What is the mass of the sample?
A. 2.00 g B. 4.00 g C. 8.00 g D. 16.0 g
A liter is equivalent to 33.8 fluid ounces. How many liters of gasoline are required to fill a 21 gallon gas tank, if 1 gallon is equivalent to 128 fluid ounces?
A. 210 liters B. 710 liters C. 80 liters D. 6 liters
Vector V1 is (5i + 7j - 3k) and vector V2 is (7i + 2 j + 14k). The component of V1 perpendicular to the line of action of vector V2 is:
(A) 4.80i + 6.94j – 3.39k (B) 4.80i - 6.94j – 3.39k (C) 4.80i - 6.94j + 3.39k (D) -4.80i + 6.94j – 3.39k
A yellow candle flame reflects from opposite surfaces of a piece of red glass
A) both images are yellow B) one image is yellow and the other red C) both images are red D) both images are reddish yellow