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GenaCL600 [577]
3 years ago
15

Two identical guitar strings are prepared such that they have the same length ( 0.62 m ) and are under the same amount of tensio

n. The first string is plucked at one location, primarily exciting the second harmonic. The other string is plucked in a different location, primarily exciting the third harmonic. The resulting sounds give rise to a beat frequency of 324 Hz . What is the wave propagation speed on the guitar strings?
Physics
1 answer:
Tanya [424]3 years ago
4 0

Answer:

The speed is 401.76m/s

Explanation:

To find the fundamental frequency we use

3rd.harmonic - 2nd.harmonic = 324Hz

And we know that

f=v/2L

So v=f2L

v= 324 x 2 x 0.62= 401.76m/s

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A solenoid inductor has an emf of 0.80 V when the current through it changes at the rate 10.0 A/s. A steady current of 0.20 A pr
barxatty [35]

Answer:

The number of turns of the inductor is 2000 turns.

Explanation:

Given;

emf of the inductor, E = 0.8 V

the rate of change of current with time, dI/dt = 10 A/s

steady current in the solenoid, I = 0.2 A

flux per turn, Ф = 8.0 μWb per

Determine the inductance of the solenoid, L

E = L(dI/dt)

L = E / (dI/dt)

L = 0.8 / (10)

L = 0.08 H

The inductance of the solenoid is given by;

L = \frac{\mu_o N^2 A}{l}

Also, the magnetic field of the solenoid is given by;

B = \frac{\mu_o NI}{l}

I is 0.2 A

B = \frac{\mu_oN(0.2)}{l} = \frac{0.2\mu_o N}{l}

\frac{B}{0.2 } = \frac{\mu_o N}{l}

L = \frac{\mu_o N^2 A}{l} \\\\L = \frac{\mu_o N }{l} (NA)\\\\L = \frac{B}{0.2} (NA)\\\\L = \frac{BA}{0.2} (N)

But Ф = BA

L = \frac{\phi N}{0.2} \\\\\phi N = 0.2 L\\\\N = \frac{0.2 L}{\phi} \\\\N = \frac{0.2 *0.08}{8*10^{-6}}\\\\N = 2000 \ turns

Therefore, the number of turns of the inductor is 2000 turns.

5 0
4 years ago
1. When does raising the temperature of a gas increase its pressure? when volume is increased and the number of particles is con
Neporo4naja [7]

Answer:

when volume and the number of particles are constant

Explanation:

Gay Lussac law states that when the volume of an ideal gas is kept constant, the pressure of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Gay Lussac's law is given by;

PT = K

\frac{P1}{T1} = \frac{P_{2}}{T_{2}}

The ideal gas law is the equation PV = nRT

Where;

P is the pressure.

V is the volume.

n is the number of moles of substance.

R is the ideal gas constant.

T is the temperature.

Generally, raising the temperature of an ideal gas would increase its pressure when volume and the number of particles are constant.

This ultimately implies that, when volume and the number of particles are held constant, there would be a linear relationship between the temperature and pressure of a gas i.e temperature would be directly proportional to the pressure of the gas. Thus, an increase in the temperature of the gas would cause an increase in the pressure of the gas at constant volume and number of particles.

3 0
3 years ago
What type of machine would most likely be used to move buckets of the mineral pieces up to the surface of the Earth? a wedge a p
inessss [21]
The type of machine would be a pulley.
3 0
3 years ago
Which are made of matter? Check all that apply.
Ber [7]

Answer:

Everything around you is made of matter, including the clothes you wear, the food you eat, and everything you touch. Even the air you breathe is made of matter. Air is a mixture of several kinds of atoms and molecules, including oxygen molecules. Skin is mostly made of collagen molecules.

Explanation:

hope this helps you

5 0
3 years ago
How long will a plane have to fly continuously with 900 miles per hour in order to cover the same distance as that from Earth to
hammer [34]

I'm not sure about the distance to the nearest star, but it's probably about        4 light-years (L-y).

1 L-y = 1.86 * 10E5 mi/sec * 3600 sec/hr * 24 hr/day * 365 day/yr

1 L-y = 5.9 *10E12 mi   and 4 L-y = 2.3 *10E13 mi    distance to star

2.3 * 10E13 mi / 900 mi/hr = 2.6 * 10E10 hr       hours to star

2.6 * 10E10 hr / (24 hr/day) = 1.1 * 10E9 day     days to star

1.1 * 10E9 day / 365 day/yr = 3 * 10E6 yr = 3 million years to star

4 0
3 years ago
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