The time constant in an RC circuit is the time that is required for the charge on the capacitor in a circuit with an initially uncharged capacitor to reach what percentage of its final value?
A. 50%
B. 37%
C. 100%
D. 63%
E. 90%
D. 63%
Physics & Space Science
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Which of the following is true of redshift?
A) Radiation that comes from great distance has tremendous redshift. B) Radiation from the hot gas of the big bang is calculated to have a redshift of about 10. C) The redshifts of different galaxies imply that these galaxies are moving toward each other. D) The redshifts of the most faint and distant galaxies known to date are about 1100.
Physics & Space Science
New surveys suggest brown dwarfs, stars under the critical mass for stable fusion, are probably very rare.
Answer the following statement true (T) or false (F)
Physics & Space Science
A temperature change of 20 C° corresponds to a temperature change of
A) 68. F°. B) 11.1 F°. C) 36. F°. D) 42. F°. E) 20. F°.
Physics & Space Science
The mass of the deuteron
Physics & Space Science