A charge of 12. C passes through an electroplating apparatus in 2.0 min. What is the average current?
What will be an ideal response?
0.10 A
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Why doesn't Mars have a stratosphere?
A) It is too far from the Sun. B) Its atmosphere does not contain enough of an ultraviolet-absorbing gas. C) Its atmosphere does not contain enough greenhouse gases. D) It is too small in size. E) It lacks a strong enough magnetic field.
A monochromatic light wave in vacuum has frequency f0 and wavelength ?0 . Which of the following are also possible frequency and wavelength combinations for a monochromatic light wave in vacuum?
a. 2f0, 2?0 b. f0/2, ?0/2 c. 2f0, ?0/2 d. None of the above are possible.
What is h?
What will be an ideal response?
An eclipsing binary will
a. be more luminous than a visual binary. b. also be observed as a spectroscopic binary. c. give off most of its light in the infrared. d. show a constant Doppler shift in its spectral lines. e. show two stars with variable proper motion.