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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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
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