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Alex17521 [72]
3 years ago
6

I'm Always in front of you. but you never see me. what am i?​

Physics
1 answer:
raketka [301]3 years ago
8 0

Answer:

air is the answer to the question

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Which of the following statements is an accurate description of vibrations?
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Two waves collide and the temporary combined waves that results is smaller that the original wave.
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A.

Destructive interference is when two waves cancel each other out or when the crest of one wave passes through the trough of another wave.
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3 years ago
A student makes a short electromagnet by winding 300 turns of wire around a wooden cylinder of diameter d 5.0 cm. The coil is co
kupik [55]

Answer:

A) μ = A.m²

B) z = 0.46m

Explanation:

A) Magnetic dipole moment of a coil is given by; μ = NIA

Where;

N is number of turns of coil

I is current in wire

A is area

We are given

N = 300 turns; I = 4A ; d =5cm = 0.05m

Area = πd²/4 = π(0.05)²/4 = 0.001963

So,

μ = 300 x 4 x 0.001963 = 2.36 A.m².

B) The magnetic field at a distance z along the coils perpendicular central axis is parallel to the axis and is given by;

B = (μ_o•μ)/(2π•z³)

Let's make z the subject ;

z = [(μ_o•μ)/(2π•B)] ^(⅓)

Where u_o is vacuum permiability with a value of 4π x 10^(-7) H

Also, B = 5 mT = 5 x 10^(-6) T

Thus,

z = [ (4π x 10^(-7)•2.36)/(2π•5 x 10^(-6))]^(⅓)

Solving this gives; z = 0.46m =

3 0
3 years ago
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False. The nuclear energy is found within the nucleus. Electrons are located outside the nucleus.
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Answer:

I am pretty sure it is B.

Explanation:

I hope this helped if it didn't I am truly sorry

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