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3 years ago

Q.01 When charging a secondary cell, energy is stored within a dielectric material using an electric field. True or False

1 answer:

4 0

True, when charging a secondary cell, energy can be stored within a dielectric material using an electric field.

<h3>Relationship between dielectric material and electric field</h3>

The electric field in a capacitor separates the negative and positive charges in the dielectric material, this causes an attractive force between each plate and the dielectric.

The dielectric material can store electric energy due to its polarization in the presence of external electric field, which causes the positive charge to store on one electrode and negative charge on the other.

Thus, when charging a secondary cell, energy can be stored within a dielectric material using an electric field.

Learn more about dielectric material here: brainly.com/question/17090590

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Musya8 [376]

Answer: T = 93 N

Explanation:

Assuming the pulley is ideal meaning frictionless as mentioned and also negligible mass.

ΣF = Σma

Mg - mg = Ma + ma

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Now looking only at the larger mass as it falls

Mg - T = Ma

T = Mg - Ma

T = Mg - Mg(M - m) / (M + m)

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T = 16(9.8)(1 - (16 - 6.7) / (16 + 6.7))

T = 93 N

or looking only at the smaller mass

T - mg = ma

T = m(g + a)

T = m(g + g(M - m) / (M + m))

T = mg(1 + (M - m) / (M + m))

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3 years ago

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mr Goodwill [35]

Answer:

a) v = 45.37 m/s and b) T = 14.4 N

Explanation:

Let's use Newton's second law with centripetal acceleration

F = ma

Let's set a reference system where the x-axis is horizontal and the y-axis is vertical, in that system the only force to decompose is tension, let's use trigonometry

sin 35 = Tₓ / T

cos 35 = $T_{y}$ / T

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$T_{y}$ = T cos 35

Y Axis

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v = √ (9.8 300 tan 35)

v = 45.37 m / s

b) the tension of the rope is

T = mg / cos 35

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Answer:

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Explanation:

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