What best describes the cosmic microwave background radiation? a. existing at the 'red' end of the light spectrum. b. moving towards us rapidly. c. low energy, a few degrees above 0 kelvin d. very high energy, millions of kelvins.
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Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9

What does the law of conservation of mass state?