What resistance is needed in a series circuit with a 20-mH coil and 1.0-?F capacitor for a total impedance of 100 ? at 1.5 kHz?
A) 0.16 k? B) 57 ? C) 18 ? D) 82 ?
B
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Magnetic Moment: A flat circular coil has 250 identical loops of very thin wire. Each loop has an area of 0.12 m2 and carries 15 mA of current. This coil is placed in a magnetic field of 0.050 T oriented at 30° to the plane of the loop. What is the magnitude of the magnetic moment of the coil?
Fill in the blank(s) with the appropriate word(s).
What diffraction technique would you use to determine the atomic positions of hydrogen in uranium hydride?
(a) X-ray diffraction (b) High-energy electron diffraction (c) Low-energy electron diffraction (d) Neutron diffraction
How can we mathematically express Newton's law of gravity? (In the following, F is the force of Gravity, G is a constant; m and M are the masses or two bodies (such as Earth and the Sun); and r is the distance between the centers of mass of the two bodies.)
A. F = GMm/r2 B. F = Gm2M/r2 C. F = GMm/r3 D. F = GMm/r
Stars of the main sequence all fall in luminosity class ________
Fill in the blank(s) with correct word