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ozzi
3 years ago
13

Based on what you know about how light travels, explain why

Physics
2 answers:
Mkey [24]3 years ago
8 0

Answer:

you can't see your back because your neck can only move in fixed direction

Brrunno [24]3 years ago
5 0
You can’t see the back of your head because the mirror is not in the direction of the back of your head
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By what factor must the amplitude of a sound wave be decreased in order to decrease the intensity by a factor of 2?
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sound intensity = sound power / (4 pi R2<span>)
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Which statement about dwarf planet locations is correct?
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Two concentric current loops lie in the same plane. The smaller loop has a radius of 3.4 cmcm and a current of 12 AA. The bigger
Free_Kalibri [48]

Answer:

Explanation:

Given that,

Current in loops are

i1 = 12A

i2 = 20A

The loops are 3.4cm apart

The magnetic field at the center is found to be zero, so when want to find the radius of bigger loop

Magnetic Field is given as

B= μoi/2πr

Where,

μo is a constant = 4π×10^-7 Tm/A

r is the distance between the two wires

i is the current in the wires

B is the magnetic field

NOTE

Field due to large loop should be equal to the smaller loop.

B1 = B2

μo•i1 / 2π•r1 = μo•i2 / 2π•r2

Then, μo, 2π cancels out, so we have

i1 / r1 = i2 / r2

Make r2 subject of formula

i1•r2 = i2•r1

r2 = i2•r1 / i2

r2 = 20×3.4/12

r2 = 5.67cm

The radius of the bigger loop is 5.67cm.

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