Why couldn't you use an electric motor to turn an electrical generator that in turn provides the electrical energy for the motor?
A. Yes, you can do this
B. No energy converter is 100% efficient
C. Motors require AC and generators produce DC
Answer: B
Physics & Space Science
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A pot that falls from a ledge and hits the ground 45 m below hits the ground at
A) 30 m/s. B) 60 m/s. C) 120 m/s. D) more than 120 m/s.
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The thermonuclear process in solar and less massive stars which produces one atom of helium from four of hydrogen is the ________
Fill in the blank(s) with correct word
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Carbon-14 dating can be used to find the age of material up to ____________ of years old
a. millions c. hundreds of thousands b. billions d. tens of thousands
Physics & Space Science
A blackbody emits a continuous spectrum
a. True b. False Indicate whether the statement is true or false
Physics & Space Science