Of the elements in your body, the only one not formed in stars is
A) hydrogen. B) calcium. C) carbon. D) iron. E) oxygen.
A
Physics & Space Science
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Gamma-ray bursts seem to be associated with violent events involving _______________
a. planets b. neutron stars c. black holes d. neutron stars or black holes
Physics & Space Science
The ideal efficiency for a heat engine operating between the temperatures of 227°C and 27°C is
A) 20%. B) 25%. C) 40%. D) 88%. E) none of the above
Physics & Space Science
Which of these colors of light has photons of greatest energy?
a. Violet b. Red c. Blue d. Yellow
Physics & Space Science
(a) What is the frequency of an EM wave that has a wavelength of 1 millimeter? (b) What type of EM wave is this?
Physics & Space Science