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BigorU [14]
3 years ago
7

An ideal parallel-plate capacitor consists of a set of two parallel plates of area A separated by a very small distance d. When

the capacitor plates carry charges + Q and - Q, the capacitor stores energy U 0. If the separation between the plates is doubled, how much electrical energy is stored in the capacitor?
Physics
1 answer:
sleet_krkn [62]3 years ago
3 0

Answer:

2dQ²/2εA = 2U₀

Explanation:

The energy stored in the ideal parallel plate capacitor U = Q²/2C. For a parallel plate capacitor, C = εA/d where A is the area between the plates and D is the distance between them. So

U = Q²/2C = Q²/2εA/d = dQ²/2εA. At distance d₁ = d, U = U₀,

U₀ = dQ²/2εA,

When d₂ = 2d, U₁ = d₂Q²/2εA = 2dQ²/2εA = 2U₀

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Compare and contrast the shape and volume of each state of matter
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Answer:

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7 0
2 years ago
Based on its type of chemical bond, which of the following has the highest boiling point?
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<h3><u>Answer;</u></h3>

Potassium chloride

<h3><u>Explanation;</u></h3>
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5 0
3 years ago
A person takes a trip, driving with a constant speed of 94.5 km/h except for a 22.0 min rest stop. If the person's average speed
qwelly [4]
From the average speed you can fix an equation:

Average speed = distance / time

You know the average speed = 65.1 kg / h, then

65.1 = distance / total time,

where total time is the time traveling plus 22.0 minutes

Call t the time treavelling and pass 22 minutes to hours:

65.1 = distance / [t + 22/60] ==> distance = [t + 22/60]*65.1

 
From the constant speed, you can fix a second equation

Constant speed = distance / time traveling

94.5 = distance / t ==> distance = 94.5 * t

The distance is the same in both equations, then you have:

[t +22/60] * 65.1 = 94.5 t

Now you can solve for t.

65.1t + 22*65.1/60 = 94.5t

94.5t - 65.1t = 22*65.1/60

29.4t = 23.87

t = 23.87 / 29.4

t  = 0.812 hours

distance = 94.5 km/h * 0.812 h = 76.7 km

Answers: 1) 0.81 hours, 2) 76.7 km


4 0
4 years ago
How does the force of gravity between two bodies change when the distance between them doubles? 1. unable to determine; the mass
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6. Drop to one quarter of its original value
7 0
3 years ago
1. What is the acceleration of a car that goes from 20 Km/hr to 100 km/hr in 8 seconds?
san4es73 [151]

Answer:

10 :)

You have to divide the difference of speed and divide it by the time. So 100-20 would be 80, and if you divide that by 8 it would be 10.

Hope this helps.

7 0
3 years ago
Read 2 more answers
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