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2 years ago

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:

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

v= 1.6

see part a point 5

this potential difference is less than cell

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

Read 2 more answers

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:

Electromotive force, abbreviation E or emf, electrical energy per unit supplied from an energy source, such as an electrical generator or a battery. In the engine or battery, electricity is transformed from one source to another as the device works on the electrical charge that is passed within itself.

In physics it is defined as Work done by a cell or battery in moving a unit charge from its one terminal to the other, against the potential.

Hence C is correct

3 0

3 years ago