Consider a situation where two moving objects collide and rebound from each other. Which of the following is not an example of potential energy?
a. The energy stored in a pile driver.
b. The energy stored in a stretched spring.
c. The energy of a body moving across a horizontal surface.
d. The energy in the water at the top of a waterfall.
C
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Many medium-mass stars will expel its outer atomosphere to form a(n) _______________ nebula as they age
Fill in the blank(s) with correct word
Which type of mirror can produce a real image?
A. plane B. diverging C. converging D. No mirror can produce a real image.
An ac signal is applied across a 40-mH inductor and a 100-? resistor. If the power factor of this circuit is 0.40, what is the frequency of the ac signal?
A) 160 Hz B) 910 Hz C) 410 Hz D) 600 Hz E) 200 Hz
An incredible amount of electrical energy passes down the funnel of a large tornado every second. Measurements taken in Oklahoma at a distance of 9.00 km from a large tornado showed an almost constant magnetic field of 1.50 × 10^-8 T associated with the tornado. What was the average current going down the funnel? (µ0 = 4p × 10^-7 T×m/A)
a. 450 A c. 950 A b. 1500 A d. 675 A