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3 years ago

Which statement about magnetic poles is accurate?

Physics

2 answers:

Ksivusya [100]3 years ago

7 0

C) Opposite magnetic poles attract, while like magnetic poles repel

GalinKa [24]3 years ago

7 0

C) Opposite magnetic poles attract, while like magnetic poles repel.

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Suppose that all the dislocations in 4700 mm3 of crystal were somehow removed and linked end to end. Given 1 m = 0.0006214 mile,

san4es73 [151]

Answer:

a. The required chain length = 292.1 miles

b. Length of the required chain = $29.2*10^6miles$

Explanation:

Cold work is the work performed on a material at a temperature below the re-crystallization temperature of the material.

Dislocation density is the measure of the total number of dislocation of a crystalline material of unit volume.

Deformation is the process of change in an objects shape due to the application of force

a. In order to find the length of required chain for the given dislocation density

length of required chain = total length of dislocation line = dislocation density * volume

where dislocation density = $10^5mm^{-2}$

and volume is given as = $4700mm^3$

$=10^5*4700mm(\frac{1mi}{1.609*10^6mm} )=292.1miles$

b. To find the length of required chain

length of required chain = dislocation density * volume

where dislocation density = $10^{10}mm^{-2}$

we substitute in the equation above to get

$=10^{10}mm^{-2}*4700mm^3\\=47*10^{12}mm*(\frac{1mile}{1.609*10^6mm} )=29.2*10^{6}miles$

6 0

3 years ago

A simple generator is used to generate a peak output voltage of 19.0 V . The square armature consists of windings that are 6.65

salantis [7]

One of the efficient concepts that can help us find the number of turns of the cable is through the concept of induced voltage or electromotive force given by Faraday's law. The electromotive force or emf can be described as,

$\epsilon = NBA\omega$

Where,

N = Number of loops

B = Magnetic Field

A = Cross-sectional Area

$\omega$ = Angular velocity

Re-arrange to find N,

$N = \frac{\epsilon}{BA\omega}$

Our values are given as,

$\epsilon = 19V$

$B = 0.434T$

$\omega = 49.8\frac{rev}{s} (\frac{2\pi rad}{1 rev}) = 99.6\pi rad/s$

$A = (6.65*10^{-2})^2 m^2$

Replacing at our equation we have:

$N = \frac{\epsilon}{( 0.434)A\omega}$

$N = \frac{19}{( 0.434)((6.65*10^{-2})^2)(99.6\pi)}$

$N = 31.63 \approx 32$

Therefore the number of loops of wire should be wound on the square armature is 32 loops

6 0

3 years ago

explain " you can not apply a force to an object with out that object applying the same force back to you"

stealth61 [152]

Answer:

Newton's Third Law Of Motion

Explanation:

3 0

3 years ago

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It is important that your muscles are very warm when doing this type of stretching.

MaRussiya [10]

Answer:

ballistic stretching

3 0

3 years ago

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Goldie Doldfish, a speed swimmer, loves to rece around the parks pond, which is 0.5 miles around. If she can swim around the tra

rosijanka [135]

Answer:

Her average speed is 0.25 miles / hour.

Explanation:

I did 0.5 divided by 2 = 0.25 miles / hour.

<em>Hope this helps! :)</em>

8 0

3 years ago