You wish to construct a simple ac generator with a maximum output of 12 V when rotated at 60 Hz. A magnetic field of 0.050 T is available. #If the area of the rotating coil is 100 cm2, how many turns are needed?
What will be an ideal response?
64
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In a nonlinear elastic material, the ratio of the increment in applied stress to the increment in strain measured at the total strain is the _____________modulus.
Fill in the blank(s) with the appropriate word(s).
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The work you do on the crate is __________
Fill in the blank(s) with correct word
According to the second law of thermodynamics, which of the following applies to the heat received from a high temperature reservoir by a heat engine operating in a complete cycle?
a. must be completely converted to work b. equals the entropy increase c. converted completely into internal energy d. cannot be completely converted to work
The two most common igneous rocks are basalt and granite. Basalt is commonly found ________, and granite is found ________
A) on the ocean floor; on the continents B) on both the ocean floor and continental land; only on the continents C) on the continents; on the ocean floor D) on the ocean floor; on both the ocean floor and on continental land