Find the rms value of the given voltage wave 2 3

Context: The results obtained in table 4.1 were gathered using a multimeter conducting on a circuit board. The results obtained in table 2.1 was obtained through theoretical calculation, and table 2.3 was obatined through a circuit simulation software. The values in tables 2.1 and 2.3 are identical. All three tables ask for Vo and I. Table 4.1 shows slight discrepancies, explain why, including many possible causes. The second question asks to recalculate Vo and I using the resistor value 5.1k ohm, the value used to obatin table 4.1. Where tables 2.1 and 2.3 were obtained with a resistor value of 5.0k ohm. The calculation is included in part 4(c). Include all steps and information. Thank you very much.

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From your understanding, what is the differnece between a grounding wire and a grounded wire? I answered this way ... Grounding wire is connecting to ground or to a conductive body extends the ground connections. Whereas the grounded wire is connected to earth or to some conducting body that serves inplace of the earth. The replied I got from a classmate "I feel your definitions here aren't exactly different. The first describes connecting to ground and the second to earth. Those are one and the same. Am I missing your meaning, or do I have that correct?" Is he right or am I really missing the subject? Please reply me soon. Thank you