Would you expect the wire temperature to be greater or less for a number 18 copper wire as compared to a number 14 copper wire, both conducting the same electrical current?
What will be an ideal response?
A number 18 copper wire has a smaller diameter and a greater electrical
resistance per unit length. Therefore the number 18 wire would be expected to
have a higher temperature than the number 14 wire.
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In a false color image,
A. colors can represent photon energies or the intensity of electromagnetic radiation. B. only one color is used. C. stars appear black and the background appears white. D. color information from optical telescopes is combined with information from a non-visible wavelength telescope to make the image.
If two stars are the same size and one is twice the temperature of the other, how much more luminous is the hotter one?
What will be an ideal response?
When sound travels faster higher above the ground than below, bending of sound tends to be
A) upward. B) downward. C) to the left. D) to the right. E) none of the above
According to the following reaction, which molecule is acting as an acid?
H3O+ + HSO4- ? H2O + H2SO4 A) H2SO4 B) H2O C) H3O+ D) HSO4- E) none of the above