Earth's projected orbit on the sky is called the _____________
Fill in the blank(s) with correct word
ecliptic
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A transformer requires
A) alternating voltage. B) direct current. C) both of these D) none of the above
An incandescent lightbulb is rated at 100 Watts when plugged into a 110 V-rms household outlet. Calculate the resistance of the filament and the rms current
a. 12.2?, 0.91 A (rms) b. 10?, 1.0 A (rms) c. 110?, 1.0 A (rms) d. 121?, 0.91 A (rms) e. 11?, 1.1 A (rms)
An electrical power plant manages to send 88% of the heat produced in the burning of fossil fuel into the water-to-steam conversion. Of the heat carried by the steam, 30% is converted to the mechanical energy of the spinning turbine. Which of the following choices best describes the overall efficiency of the heat-to-work conversion in the plant (as a percentage)?
a. greater than 88% c. 30% b. 64% d. less than 30%
Which of the following combinations of nucleons would be the most likely to result in a stable nucleus? ("Odd" and "even" refer to the numbers of protons and neutrons in the nucleus.)
A) odd protons, even neutrons B) even protons, odd neutrons C) odd protons, odd neutrons D) even protons, even neutrons