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coldgirl [10]
3 years ago
14

When the top right-hand capacitor is filled with a material of dielectric constant κ, the charge on this capacitor is increases

by a factor of 1.35. Find the dielectric constant κ of the material inserted into the top right-hand capacitor.

Physics
2 answers:
Olin [163]3 years ago
6 0

Answer: k = 2.07692

Explanation: Please find the attached files for the solution

solong [7]3 years ago
4 0

Answer:

Explanation:

Given:

Capacitance, c1 = c2 = c3 = c4

= 80 micro farad

Voltage, v = Eb

= 4 V

We are not concerned with c3 and c4 just c1 and c2,

Since c1 and c2 are in series,

1/ct = 1/c1 + 1/c2

vab = v1 + v2

= q'/c1 + q'/c2

But c2 = κ × c,

= q'/c + q'/κc  .....1

Let c1 = c2 = c,

Vab = q/c + q/c

= 2 × q/c. ........2

Equating equation 1 and 2,

q'/c + q'/κc = 2q/c

q'/c × (1 + 1/κ) = 2q/c

q'/q = 2κ/(1 + κ)

But q'/q = 1.35

2κ/(1 + κ) = 1.35

0.65κ = 1.35

κ = 1.35/0.65

= 2.077

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Answer: 6.36

Explanation:

Given

Radius of grindstone, r = 4 m

Initial angular speed of grindstone, w(i) = 8 rad/s

Final angular speed of the grindstone, w(f) = 12 rad/s

Time used, t = 4 s

Angular acceleration of the grinder,

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α = w(f) - w(i) / t

α = (12 - 8) / 4

α = 4/4 = 1 rad/s²

Number of complete revolution in 4s =

Δθ = w(i).t + 1/2.α.t²

Δθ = 8 * 4 + 1/2 * 1 * 4²

Δθ = 32 + 1/2 * 16

Δθ = 32 + 8

Δθ = 40 rad/s

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Which one of the following indicates a drop in temperature?
Nitella [24]
Answer: <span>D. A bimetallic strip bends so that the steel is on the outside curve
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When you put two kinds of different metal with a different coefficient of thermal expansion, the outer curve metal will be the one with lesser coefficient when temperature drop. Since the question about drop in temperature then the metal should be bend
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3 years ago
Two sets of solid double yellow lines spaced two or more feet apart indicate:.
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6 0
2 years ago
PHYSICSSS PLEASE HELP
Aleonysh [2.5K]

Answer:

1. 10.5 Kg

2. s/g

Explanation:

1. Determination of the mass of gasoline

Density of gasoline = 0.7 Kg/L

Volume of gasoline = 15 L

Mass of gasoline =?

The density of a substance is simply defined as the mass of the substance per unit volume of the substance. Mathematically, the density of a substance can be expressed as:

Density = mass / volume

With the above formula, we can obtain the mass of the gasoline as follow:

Density of gasoline = 0.7 Kg/L

Volume of gasoline = 15 L

Mass of gasoline =?

Density = mass / volume

0.7 = Mass of gasoline / 15

Cross multiply

Mass of gasoline = 0.7 × 15

Mass of gasoline = 10.5 Kg

2. Density has various units some are listed below:

I. Kilogram per litre (Kg/L)

II. Kilogram per cubic metre (Kg/m³)

III. Milligram per millilitre (mg/mL)

IV. Gram per millilitre (g/mL)

V. Gram per cubic centimetre (g/cm³)

Considering the options given in the question above, it is evident that second per gram (s/g) is not a unit of density because density is mass per unit volume.

3 0
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