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ser-zykov [4K]
3 years ago
7

A person has a far point of 50 cm. If he is wearing glasses 2 cm from the eyes, determine

Physics
1 answer:
Alla [95]3 years ago
7 0

Answer:

The power will be "2.08 D".

Explanation:

According to the question,

The location of the image form lens,

d_i=50-2

    =48 \ cm

We know that,

⇒ \frac{1}{d_i} -\frac{1}{d_o} =\frac{1}{f}

here,

d_o = Object location

d_i = Image location

f = Focal length

On putting the values in the above expression, we get

⇒ \frac{1}{48} -\frac{1}{\infty} =\frac{1}{f}

             f=48 \ cm  

or,

             f=0.48 \ m

hence,

The refractive power will be:

⇒ P=\frac{1}{f}

       =\frac{1}{0.48}

       =2.08 \ D

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Answer:

The flux of the electric field through the surface is 3.24\times10^{3}\ Nm^/C[/tex].

Explanation:

Given that,

Area of cube = 48 cm²

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Using formula Gauss's law

The electric flux through any closed surface,

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Put the value into the formula

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Hence, The flux of the electric field through the surface is 3.24\times10^{3}\ Nm^/C[/tex].

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4 years ago
What is the emf produced in a 1.5 meter wire moving at a speed of 6.2 meters/second perpendicular to a magnetic field of strengt
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Due to its current position in the Earth's gravitational field relative to its initial position, all of the energy at this point is gravitational potential energy. As the ball experiences constant downward acceleration, its motion immediately becomes apparent in that direction because the acceleration easily transforms gravitational potential energy back into kinetic energy.

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To learn more about what happens when a ball is thrown vertically upward:

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How are steam powered boats different from sailboats
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