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Brut [27]
2 years ago
5

A 800hz tuning fork is vibrating, producing a sound wave in the air.

Physics
1 answer:
blsea [12.9K]2 years ago
3 0

Answer:

The frequency of the sound wave is 800Hz

The speed of sound in a is about 340m/s.

Velocity = frequency x wavelength

making wavelength the subject formula

wavelength = Velocity/frequency.

wavelength = 340/800

wavelength = 0.425m.

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You have designed and constructed a solenoid to produce a magnetic field equal in magnitude to that of the Earth (5.0 10-5 T). I
saul85 [17]

Answer:

I = 0.03637 A

Explanation:

The given data in the question is

Magnetic field : B = 5.0 \times 10^{-5} T

Turns : N = 350

Length : L = 32 cm = 0.32 m

So, number of turns per unit length :

n=\frac{N}{L}

n=\frac{350\: turns}{0.32 m}

n=1093.75 \: turns \: per \: meter

If current is I , then magnetic field is given by

B = \mu_{0} \times n \times I

Also,

I = \frac{B}{\mu_{0} \times n}

Insert the values

I = \frac{5.0 \times 10^{-5}}{4 \pi \times 10^{-7} \times 1093.75} A

I = 0.03637 A

The current will be I = 0.03637 A

5 0
4 years ago
The common version of Newton’s second law of motion, EF= ma, is actually a special case that is true only when an objects _____
vladimir2022 [97]

Answer:

A

Explanation:

only is true when the objects mass is constant

6 0
3 years ago
Read 2 more answers
How do u work out b)<br> ii)
Yakvenalex [24]

Explanation:

potential difference = current × risstance

see part a point3 current is same

v= IR

v = 8×0.2

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7 0
3 years ago
Kara is pushing a shopping cart to the right. The applied force is acting _______.
mafiozo [28]

Answer:

D.) to the right

8 0
3 years ago
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Which one of the following statements concerning emf is true?
Andrej [43]

Answer:

C) Emf is the force exerted on a single charge to move it from one terminal to the other of an emf device.

Explanation:

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Hence C is correct

3 0
3 years ago
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