A physicist has two slits and two light sources to choose from, and wants to choose the configuration that will give the most data. The more maxima projected onto the screen, the more data. If slit 1 is smaller than slit 2, and the wavelength of source 1 is smaller than that of source 2, which ones should be used? e?
1.slit 1 and source 1
2.slit 2 and source 2
3.slit 2 and source 1
4.slit 1 and source 2
3
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A) a necessary condition, but not a sufficient condition for life B) a sufficient condition, but not a necessary condition for life C) both a necessary condition and a sufficient condition for life D) neither a necessary condition nor a sufficient condition for life
A constant current I in a coil of inductance L does not produce an emf in that coil
Indicate whether the statement is true or false
Between the processes of nuclear fission and fusion, radioactive by-products are more characteristic of nuclear
A) fission. B) fusion. C) both of these D) neither of these
A proton has a total energy of 2.5 × 10^?10 J. How fast is it moving? (M = 1.67 × 10^?27 kg)
a. 0.90 c b. 0.80 c c. 0.70 c d. 0.60 c e. 0.40 c