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3 years ago

Electro-magnets are created by...

Physics

1 answer:

mojhsa [17]3 years ago

6 0

Wrapping in insulated wire around a medal with ferromagnetic properties and applying an electric current

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Suppose that the separation between two speakers A and B is 4.80 m and the speakers are vibrating in-phase. They are playing ide

Hatshy [7]

Answer:

$X=8.44m$

Explanation:

From the question we are told that

Distance b/w A&B $x=4.80m$

Frequency $f=134Hz$

Sound speed $v=343m/s$

Generally the equation for wavelength is mathematically given as

$\lambda=v/f$

$\lambda/2=1/2*v/f$

$\lambda/2=1/2*\frac{343}{135}$

$\lambda/2=1.27037037$

Generally the destructive interference X is mathematically given by

$\sqrt{4.8^2 +X^2} -X=1.27037037\\$

$23.04+BC^2=X^2+1.613+2.54*X$

Therefore the destructive interference is

$X=8.44m$

4 0

3 years ago

A bus is moving at a constant speed of 40 m/s. How many hours will it takes to travel 260 miles?

lawyer [7]

Explanation:

1 mile = 1609m

Distance=260 miles= 418340 m

Speed= 40 m/s

Time = distance/speed

= 418340/40

=10458.5 seconds

= 2.9 hours

8 0

3 years ago

When large amplitude sound vibrates the ear significantly, a _______ results.

kondaur [170]

D loud sound

Hope this helped:)

4 0

3 years ago

Read 2 more answers

All neutron stars are things that produce intense gravity. All neutron stars are extremely dense objects. Therefore, all extreme

nika2105 [10]

Answer:

Major term is 'things that provide intense gravity'

Minor term is 'extremely dense objects'

Middle term is 'neutron stars'

Explanation:

Major term is given by the predicate part of the conclusion
Minor term is given by the subject part of sentence in conclusion
Middle term is given by the subject part and not the conclusion

6 0

4 years ago

78. A film of oil on water will appear dark when it is very thin, because the path length difference becomes small compared with

Hoochie [10]

To solve this problem it is necessary to apply the concepts related to the condition of path difference for destructive interference between the two reflected waves from the top and bottom of a surface.

Mathematically this expression can be described under the equation

$\delta = 2nt$

Where

n = Refractive index

t = Thickness

In terms of the wavelength the path difference of the reflected waves can be described as

$\delta = \frac{\lambda}{4}$

Where

\lambda = Wavelenght

Equation the two equations we have that

$2nt = \frac{\lambda}{4}$

$t = \frac{\lambda}{8n}$

Our values are given as

$\lambda = 380nm \rightarrow$ Wavelength of light

$n = 1.4$

$t = \frac{380nm}{8*1.4}$

$t = 33.93nm$

Therefore the minimum thickness of the oil for destructive interference to occur is approximately 34.0 nm

4 0

3 years ago