A 120-V circuit has a breaker rated at 10 amps. If a 1050-W toaster is operating on this circuit, what is the largest number of 100-W bulbs that may also operate simultaneously on this circuit without tripping the breaker?
1.0
2.1
3.2
4.more than 2
2
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A column that extends from sea level to the top of the atmosphere contains a certain mass of air. If the column instead contained the same mass of mercury, its height would be about
A) 3/4 meter. B) 10.3 meters. C) 5.6 kilometers. D) none of the above
Find the force exerted by reflecting sunlight off a reflecting aluminum sheet in space if the area normal to the sunlight is 10,000 m2 and the solar intensity is 1350 W/m2.
A. 0.72 N B. 0.09 N C. 9 N D. 45 N E. 0.18 N
The maximum value of the electric field in an electromagnetic wave is 2.0 V/m. What is the maximum value of the magnetic field?
A) 6.7 pT B) 6.7 mT C) 6.7 nT D) 6.7 ?T E) 6.7 T
According to Aristotle, which scenario illustrates violent motion?
a. An apple falling from a tree b. A mass of warm air rising above hot pavement c. An arrow moving through the air after leaving the bow d. A person pushing a car along the street e. A barrel rolling down a ramp