Impedance: A 100-? resistor is connected in series with a 10.0-mH inductor across an ac source operating at 1.00 kHz. What is the impedance of this circuit?
A. 100 ?
B. 118 ?
C. 200 ?
D. 236 ?
E. 1000 ?
Answer: B
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The Curiosity rover has detected evidence of what kind(s) of chemical activity in Mars' soil?
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A hypothesis is a very tentative explanation of some ______________ of nature
Fill in the blank(s) with correct word
How much heat (in kilocalories) is needed to convert 1.00 kg of ice at 0°C into steam at 100°C?
a. 23.9 b. 79.6 c. 564 d. 643 e. 720