Which of the following actions are minimally necessary to determine if a motion detector should be calibrated before using it to investigate the motion of an object?

A. Measure the position of an object without using the motion detector, and see if the motion detector identifies the same position.
B. Measure the velocity of an object without using the motion detector, and see if the motion detector identifies the same velocity.
C. Both of these actions are required; neither is sufficient by itself.
D. Neither of these actions is required; no additional measurements are needed for calibration.

To calibrate a motion detector, both the position and velocity of an object should be measured using an alternate method and compared to the readings of the motion detector. If there are disparities in the readings, calibration is needed. Hence, the answer is option C, as both actions are required.

Explanation:

The minimally necessary actions to determine if a motion detector should be calibrated before using it to investigate the motion of an object involve testing it via comparative measurements. It is crucial to reference an established frame to accurately define motion. Therefore, measuring both the position and velocity of an object using alternative methods, and comparing these with the readings from the motion detector could provide insight if calibration is needed.

Let's take option A for example: Measure the position of an object without using the motion detector, and see if the motion detector identifies the same position. If, for instance, you use a ruler to gauge the position of an object and the motion detector doesn't report a similar value, it suggests that the device needs calibration. Similarly, option B: Measure the velocity of object without using the motion detector and see if the motion detector identifies the same velocity, applies the same process for determining the velocity of the object.

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