Which statement describes something that should always be done at the end of a calculation? A) Include an error estimate with your answer.

B) Include extra digits when you round your final answer, for greater accuracy.

C) Check that the numerical answer is reasonable and the units are what you expected.

D) Express your numerical answer in English units.

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