What is the significance of the colors of Uranus and Neptune?
What will be an ideal response?
Traces of methane absorb red light and thus make the atmosphere look green-blue.
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Two transparent materials are in contact. The one on the left has a lower index of refraction than the one on the right (nL A. The transmitted wave is unaffected and the reflected wave in inverted.
B. The transmitted wave is inverted and the reflected wave in unaffected.
C. Both the transmitted and reflected waves are inverted.
D. Both the transmitted and reflected waves are unaffected.
If you are measuring the length of a room, the most appropriate SI unit is the
A) kilometer. B) meter. C) centimeter. D) millimeter. E) micrometer.
An ideal parallel-plate capacitor consists of two parallel plates of area A separated by a distance d. This capacitor is connected to a battery that maintains a constant potential difference across the plates
If the separation between the plates is now doubled, the amount of electrical energy stored on the capacitor will A) double. B) quadruple. C) be cut in half. D) be cut in fourth. E) not change.
Which of the following polymer combinations is least likely to mix?
(a) Liquids of two different long-chain molecules with a positive enthalpy of mixing. (b) A liquid solvent and solid polymer with solubility parameters of 19 MPa0.5 and 20 MPa0.5, respectively. (c) Liquids of two different long-chain molecules with a negative enthalpy of mixing. (d) Liquids of two different short molecules with a positive enthalpy of mixing.