An 880-MW electric power plant has an efficiency of 20.0%. It loses its waste heat in large cooling towers. Approximately how much waste heat (in MJ) is discharged to the atmosphere per second?
a. 5 280 MJ
b. 3 520 MJ
c. 880 MJ
d. 4 400 MJ
e. 7 040 MJ
b
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Which of the following statements best describes the two principle advantages of telescopes over eyes?
A) Telescopes can collect far more light with far greater magnification. B) Telescopes have much more magnification and better angular resolution. C) Telescopes collect more light and are unaffected by twinkling. D) Telescopes can collect far more light with far better angular resolution.
: For a more precise lattice parameter, determine the lattice parameter from each of the peak intensities for tungsten in Figure 15.4. Then plot the value of a determined for each peak intensity as a function of the value of sin2 ? used to calculate a. The most accurate value of a results from extrapolation of sin2 ? to 1.0.
(a) Present your data table and plot. (b)What lattice parameter results?
The rings around Uranus and Neptune are confined by shepherd satellites
Indicate whether the statement is true or false
What is the safest way or method to observe a solar eclipse?
a. using a telescope b. wearing sunglasses c. by observing with your naked eyes d. through a pinhole projection e. through a UV filter held up to the sky