In a thunderstorm cloud, the concentration of negative charge is in the __________ portion of the cloud
Fill in the blank(s) with correct word
lower
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An ideal transformer has 200 turns on its primary and 12 turns on its secondary. If the power input to the transformer is 120 kW, what is the power output?
A. 0.600 kW B. 7.20 kW C. 10.0 kW D. 120 kW E. 240 kW
A copper wire from a large spool is cut into two lengths to make extension cords, one 50 feet long and the other 75 feet long. Which of the following is true?
A. The longer cord will be able to carry more current B. The shorter cord will have a smaller voltage C. The shorter cord will dissipate more power D. The longer cord will have more resistance
A parallel plate capacitor has a dielectric with constant 3.5. The plates are circular with radius 0.07 m, and the separation gap is 0.375 mm. What energy may be stored in this capacitor if 1250 V is the applied voltage?
a. 
b. 
c. 
d. 
Velocity Addition: A spaceship is moving in a straight line away from Earth at 0.80c, measured relative to Earth. It launches a missile that moves away from the spaceship in the forward direction at 0.60c, relative to the ship. Relative to Earth, what is the speed of this missile?
A. greater than 0.80c but less than c B. 1.4 c C. c D. greater than c but less than 1.4c