A resistance heater is rated at 1200 W when operating at 110 V dc. What current will it draw?
A) 0.090 A B) 1.0 A C) 12 A D) 11 A
D
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Predict the mass diffusivity of benzene, C6 H6, in air at 20ºC and 1 atm pressure using Equation 8-24. Compare this value to that from experimental values.
A distinctive feature of quarks is that they
A) are always observed singly, since they do not readily interact with other particles. B) have zero charge. C) have zero rest mass. D) have fractional electric charge.
The wind speeds found in the bands and zones of Saturn, compared to those on Jupiter, are about:
A) 3 times faster. B) 2 times faster. C) the same. D) 2 times slower. E) 3 times slower.
Two objects are dropped from a bridge, an interval of 1.0 s apart. Air resistance is negligible. During the time that both objects continue to fall, their separation
A) decreases. B) increases at first, but then stays constant. C) increases. D) stays constant. E) decreases at first, but then stays constant.