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Anna [14]
2 years ago
7

Please help me find this answer

Physics
2 answers:
djyliett [7]2 years ago
5 0

Answer:

155/62 = 2.5

Mass/Volume = Density

Density= 2.5

Explanation:

Romashka [77]2 years ago
3 0
The equation is given. We know there is 155g and 62cm^3.

therefore the equation is 155g/ 62cm^3 giving you 2.5 as the density.
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A metal ring 4.30 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpend
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Answer:

A)0.00966 N/C

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Explanation:

We are given;

Diameter of the metal ring; d = 4.3 cm

Radius;r = 2.15 cm = 0.021- m

Initial magnetic field, B = 1.12 T

Rate of decrease of the magnetic field;dB/dt = 0.23 T/s

Now, as a result of change in magnetic field, an emf will be induced in it. Thus, , electric field is induced and given by the formula :

∫E•dr = d/dt∫B.A •dA

This gives;

E(2πr) = dB/dt(πr²)

Gives;. 2E = dB/dt(r)

E = dB/dt × 2r

We are given;

E = 0.23 × 2(0.021)

E = 0.00966 N/C

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B) The direction of electric field will be in a counterclock wise direction when viewed by someone on the south pole of the magnet

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