In the brain, a typical frequency for an alpha wave is ______ Hz and for a delta wave is ______ Hz
a. 2, 4
c. 12, 4
b. 3, 12
d. 10, 14
C
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Suppose that we double the electrical power flowing into the filament of an incandescent bulb. By what factor will the most probable photon energy ? p increase?
A. 2 1/4 B. 21/3 C. 21/2 D. 2 E. 4 F. 8 T. 16
Mortimer pushes against a wall with a force of 10 newtons for a time of 5 seconds. How much work does Mortimer do on the wall?
A) none B) 5 J C) 50 J D) 2 J E) 10 J
The following three appliances are connected in parallel across an ideal 120-V dc power source: 1200-W toaster, 650-W coffee pot, and 600-W microwave. If all were operated at the same time what total current would they draw from the source?
A) 5.0 A B) 4.0 A C) 20 A D) 10 A
When relating the linear momentum and total energy of an object with speed v = 0.8c, which of the following changes would increase the energy by the greatest amount? Assume that it is possible to change the mass of the object