You carry a 20 N box 5 m horizontally across a room. The work you do is
a. 0 c. 100 J
b. 4 J d. none of the above
A
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A straight wire is bent into the shape shown. Determine the net magnetic force on the wire.
A. Zero B. IBL in the +z direction C. IBL in the ?z direction D. 1.7 IBL in the +z direction E. 1.4 IBL in the ?z direction
Series Resonance: What is the resonance frequency of a series ac circuit consisting of a 40.0 ?F capacitor, a 55-? resistor, and a 0.030 H inductor?
A. 0.15 kHz B. 0.9 kHz C. 6.9 kHz D. 6 kHz
Galaxies that are far away from us have spectra that are redshifted more than galaxies that are closer to us. It is thought that the reason for this is that
A. the stars in more distant galaxies are older and cooler than those nearby. B. we are at the center of an expanding universe. C. we are at the edge of the universe and moving away from the center. D. space itself is expanding.
What is the formula mass of a molecule of C6H12O6?
A) 180 amu B) 24 amu C) 29 amu D) 168 amu E) none of the above