The following three appliances are connected to a 120-V house circuit: i) toaster, 1 325 W, ii) coffee pot, 650 W, and iii) microwave, 600 W. If all were operated at the same time, what total current would they draw?
a. 2.10 A
b. 47.5 A
c. 7.15 A
d. 21.5 A
e. 11.0 A
d
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Engines, including car engines, are rated in horsepower. What is horsepower?
(a) The force needed to start the engine. (b) The force needed to keep the engine running at a steady rate. (c) The energy the engine needs to obtain from gasoline or some other source. (d) The rate at which the engine can do work. (e) The amount of work the engine can perform
How long a star can remain on the main sequence depends upon its __________
Fill in the blank(s) with correct word
Sonic Booms: A jet flies at 1.4 times the speed of sound. What is the half-angle of the conical shock wave formed?
A. 30° B. 36° C. 44° D. 46°
A pendulum clock at high altitudes runs
A) fast. B) slow. C) normally as it does at sea level.