What were the major reasons for the great increase in size of the typical power plant as seen in Fig. 8.10?
What will be an ideal response?
In addition to innovations in power plant engineering, the utilities were taking
advantage of economies of scale.
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A ball drops some distance and loses 30 J of gravitational potential energy. Do not ignore air resistance. How much kinetic energy did the ball gain?
A) more than 30 J B) exactly 30 J C) less than 30 J D) Cannot be determined from the information given.
If the back of a person's eye is too close to the lens, this person is suffering from
A) nearsightedness. B) spherical aberration. C) astigmatism. D) chromatic aberration. E) farsightedness.
Monochromatic light (? = 500 nm) is incident on a soap bubble (n = 1.4) that is 500-nm thick. Calculate the change of phase of the light that penetrates the front surface, reflects from the second surface, and emerges through the first surface as an angle between 0° and 360°?
a. 280° b. 160° c. 220° d. 100° e. 290°
A champion athlete can produce one horsepower (746 W) for a short period of time. The number of 16 cm high steps a 70 kg athlete could ascend in one minute while expending one horsepower is
a. 4. b. 7. c. 65. d. 408. e. 4 567.