A 200. mH inductor is connected to a 60. Hz, 120. volt rms, source
(a) What is the inductive reactance?
(b) What is the rms current to the inductor?
(c) If both the inductance and the frequency doubled, what would be the current?
(a) 75.4 Ω
(b) 1.59 A
(c) 0.398 A
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Would water molecules in Venus's atmosphere, whose temperature is 740 K, eventually es-cape into outer space? Note that a water molecule has a mass that is 18 times that of a hy-drogen atom. The escape velocity of Venus is 10 km/s. For comparison, a hydrogen atom has an average velocity of 2.5 km/s at a temperature of 300 K.
a. No, the average velocity of water molecules is 0.9 km/s. b. Yes, the average velocity of water molecules is 0.9 km/s. c. Yes, the average velocity of water molecules is 2.1 km/s. d. No, the average velocity of water molecules is 2.1 km/s. e. Yes, the average velocity of water molecules is 19 km/s.
When a speeding roller-coaster car is at the bottom of a loop, the magnitude of the normal force exerted on the car’s wheels due to its interaction with the track is
A. Greater than the weight of the car and its passengers. B. Equal to the weight of the car and its passengers. C. Less than the weight of the car and its passengers.
A time zone is theoretically ______________° wide
Fill in the blank(s) with correct word
Explain how the eccentricity describes the shape of an ellipse
What will be an ideal response?