What statements best define percent error? Check all that apply. - It is a mathematical way of showing accuracy.
- The higher the percent error, the more accurate the data set.
- The higher the percent error, the less accurate the data set.
- Only the experimental value is needed to calculate percent error.
- Only the actual, or accepted, value is needed to calculate percent error.
- A percent error always has a positive value.


It is a mathematical way of showing accuracy.
The higher the percent error, the less accurate the data set.
A percent error always has a positive value.

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You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.

How long will it take a car traveling of a constant speed of 45m/s to cover the distance of a 2.5km?