Give reasons:A freely suspended magnet showsN-S poles at rest.
1 answer:
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The frequency at which the body vibrates breaks is natural frequency. The glass with her voice because the frequency of her voice matches the natural frequency of the glass.
<h3>What is the natural frequency?</h3>When there is no external force acting on the body unless the body vibrates is known as the natural frequency of vibration.it is denoted by .
when the frequency of a body matches the natural frequency a condition occurs known as resonance.
To learn more about the natural frequency refer to the link;
Answer:
ρ = 1.6*10⁻⁸ Ω/m.
Explanation:
- Applying Ohm's Law to the wire, assuming that it can be treated as a pure resistance, the resistance of the wire can be obtained as follows:
- At the same time, we know that there exists a relationship between the resistance, the resistivity ρ, the length L and the area A of the wire, that is given for the following expression:
- The area of the circular section of the wire, can be expressed as a function of the diameter d, as follows:
- Replacing the left side of (2) by (1), and (3) on the right side, we can solve for the resistivity ρ as follows:
- ρ = 1.6*10⁻⁸ Ω/m