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nordsb [41]
2 years ago
12

If a girl carries groceries up a flight of stairs, is she doing work on the groceries? Explain.​

Physics
1 answer:
nikdorinn [45]2 years ago
4 0

Answer:

Explanation:

Yes she is doing work. With or without the groceries, she is still doing work. She does more work with the groceries than without because Work is defined by F which is defined by mass. The mass increases with the groceries.

The work done is against the force of gravity.

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Answer:

Nora's boat is moving towards Sam at 5 km/hr

Explanation:

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Pictorially we can represent the given condition as:

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2 years ago
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If a transformer has 50 turns in the primary winding and 10 turns on the secondary winding, what is the reflected resistance in
Elza [17]

Answer:

The reflected resistance in the primary winding is 6250 Ω

Explanation:

Given;

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Now, determine the reflected resistance in the primary winding;

\frac{R_P}{R_S} = K^2\\\\R_P = R_SK^2\\\\R_P = 250(5)^2\\\\R_P = 6250 \ Ohms

Therefore, the reflected resistance in the primary winding is 6250 Ω

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