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Keith_Richards [23]
3 years ago
14

Look of the diagram below. What condition does this show?Enter your answer​

Physics
1 answer:
irina1246 [14]3 years ago
6 0

Answer:

hypermetropia

Explanation:

long-sightedness.

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According to current scientific thinking how did the solar system that contains earth form
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A 0.260 m radius, 525 turn coil is rotated one-fourth of a revolution in 4.17 ms, originally having its plane perpendicular to a
Sophie [7]

Answer:

B = 0.37T

Explanation:

In order to calculate the needed magnitude of the magnetic force you use the following formula, which calculate the induced emf of the solenoid when there is a change in the magnetic flux:

emf=-N\frac{\Delta \Phi_B}{\Delta t}=-N\frac{\Delta (BAcos\theta)}{\Delta t}       (1)

emf: induced voltage in the solenoid = 10,000V

N: turns of the solenoid = 525

ФB: magnetic flux

B: magnitude of the magnetic field = ?

A: cross-sectional area of the solenoid = π*r^2

r: radius of the cross-sectional area = 0.260m

Δt: interval time of the change of the magnetic flux = 4.17ms = 4.17*10^-3s

First, you have the magnetic field direction perpendicular to the plane of the solenoid, after, the angle between them is 90°  (quarter of a revolution)

In the equation (1) the only parameter that changes on time is the angle, then, you can solve for B from the equation (1):

emf=-NBA\frac{cos(90\°)-cos(0\°)}{\Delta t}=\frac{NBA}{\Delta t}\\\\B=\frac{(\Delta t)(emf)}{NA}=\frac{(\Delta t)(emf)}{N(\pi r^2)}\\\\

Finally, you replace the values of the parameters to calculate B:

B=\frac{(4.17*10^{-3}s)(10000V)}{(525)(\pi(0.260m)^2)}=0.37T

The strength of the magnetic field is 0.37T

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3 years ago
What is speed of light <br><img src="https://tex.z-dn.net/?f=%20%7B%3F%7D%20" id="TexFormula1" title=" {?} " alt=" {?} " align="
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Answer:

3 \times  {10}^{8} m {s}^{ - 1}

299 792 458 m / s

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A pool ball hits a second pool ball with equal mass. The first pool ball comes to a complete stop, while the second pool ball ro
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A pool ball hits a second pool ball with equal mass. The first pool ball comes to a complete stop, while the second pool ball rolls away.

The second pool ball's velocity will be the same as the first pool ball's velocity was.<em> (B)</em>  

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