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sergey [27]
4 years ago
5

An is_____ produced around a wire when electrical current is in the wire

Physics
1 answer:
svlad2 [7]4 years ago
3 0
 <span>A magnetic field is produced around a wire when electrical current is in the wire :)</span>
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In what setting do all frequencies of electromagnetic waves travel at the same speed?
Irina-Kira [14]
All electromagnetic waves travel in vacuum (space) at the speed of light (3 * 10^8 m/s). Radio waves is just a member of the electromagnetic spectrum. All electromagnetic waves follow the wave equation: speed = frequency * wavelength. With all electromagnetic waves, the speed in space is the same.
6 0
3 years ago
A machinist with normal vision has a near point at 25 cm. The machinist wears eyeglasses in order to do close work. The power of
Alik [6]

Answer:

17.4 cm

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Power of lens = +1.75 diopters

Focal length of lens

f=\frac{100}{1.75}=\frac{400}{7}

This is a convex lens as focal the diopter given is positive which makes the focal length positive. Image distance will be negative.

v = -25

\frac{1}{v}-\frac{1}{u}=\frac{1}{f}\\\Rightarrow \frac{1}{-25}-\frac{1}{u}=\frac{1}{\frac{400}{7}}\\\Rightarrow -\frac{1}{u}=\frac{7}{400}+\frac{1}{25}\\\Rightarrow \frac{1}{u}=-\frac{7}{400}-\frac{1}{25}\\\Rightarrow \frac{1}{u}=-0.0575\\\Rightarrow u=-17.4\ cm

∴ The new near point is 17.4 cm

7 0
3 years ago
After watching a show about submarines, Jamil wants to learn more about the oceans. Which question could be answered through sci
Georgia [21]
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7 0
3 years ago
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As stars age and become larger they become ________ and ________
sleet_krkn [62]
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A. What is the coefficient of kinetic friction?
Andrews [41]

Explanation:

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7 0
3 years ago
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