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3 years ago

What is the smallest frequency at which the string can be moved to produce any standing wave?

2 answers:

8 0

The first harmonic would be the smallest frequency for a string to produce a standing wave. In addition, the strings were fixed in a single attachment and have only limited motion. It is because standing waves require a specific medium for the sound to travel in it.

dem82 [27]3 years ago

4 0

Answer:

v/2l the first harmonic of the wave.

Explanation:

Since the first harmonic of standing wave is produced when the wavelength is double of the string length, so that crest and trough of the wave falls over one another to form a standing wave.

As v=fλ and λ=2L (L being the length of the string)

so, f=v/2L

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3 years ago

La corriente en un circuito se triplica conectando una R1 = 500 Ω en paralelo con la resistencia R del circuito. Determinar R en

Alexxx [7]

Answer:

R = 1000 ohm

Explanation:

In a circuit with a resistor R, the current is

V = i R

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V = i Req

i = V / Req

3i₀ = V / Req

we substitute

3 (V / R) = V / Req

3 / R = 1 / Req

R = 3 Req

the equivalent resistance of the two resistors in parallel is

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R_{eq} = $\frac{R \ R_1}{R + R_1}$

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⅓ (R₁ + R) = R₁

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