1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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

You might be interested in
Which factors affect heat transfer between a warm and a cool substance?
damaskus [11]
Factors that affect heat transfer are:

1) Difference in temperature, 
2) Mass of the object
3) Specific heat of the object

Hope this helps!
8 0
3 years ago
A reservoir located in the mountain 250 m above sea level flows through a pipe to a hydroelectric plant in a town at sea level.
Pavlova-9 [17]

Answer:

     v₂ = 70 m / s

Explanation:

For this exercise let's use Bernoulli's equation

where subscript 1 is for the top of the mountain and subscript 2 is for Tuesday's level

 

          P₁ + ½ ρ v₁² + ρ g y₁ = P₂ +1/2 ρ v₂² + ρ g y₂

indicate that the pressure in the two points is the same, y₁ = 250 m, y₂ = 0 m, the water in the upper part, because it is a reservoir, is very large for which the velocity is very small, we will approximate it to 0 (v₁ = 0), we substitute

         ρ g y₁ = ½ ρ v₂²

         v₂ = \sqrt {2g \ y_1}

let's calculate

         v₂ = √( 2 9.8 250)

         v₂ = 70 m / s

6 0
3 years ago
Would u rather/ be able to fly. or be able to turn invisable
mojhsa [17]

Answer:

fly......................

4 0
2 years ago
Read 2 more answers
Why do the graphs differ?​
melisa1 [442]

Well first graph represents rectangular hyperbola

vu = c^2 ( c is constant)

AS 1/v + 1/u = 1/f

Take1/ f to be constant c

1/v = c - 1/u

it is of the form y = - x + k

Slope = -1 having intercept k as shown in fig 2

3 0
3 years ago
A tennis ball travels the length of the court 24m in 0.5 s find its average speed
melomori [17]
Speed = distance/time
4 0
3 years ago
Read 2 more answers
Other questions:
  • you push a ball to star it rolling along a "perfectly frictionless" surface. How far will the ball roll
    11·1 answer
  • HELP ME PLZ 30 POINT AND A MARK
    6·1 answer
  • Which type of energy in gasoline is transformed into mechanical energy in a motorcycle engine?
    6·2 answers
  • A solar cell has an open circuit voltage value of 0.60 V with a reverse saturation current density of Jo = 3.9 × 10−9 A/m2 . The
    13·1 answer
  • Explain how Rutherfords' gold foil experiment explains how this experiment confirms the nuclear model of the atom and the idea t
    15·1 answer
  • What two quantities must stay the same in order for an object to have a constant velocity? A) The speed and kinetic energy must
    15·1 answer
  • How do scientists study pollen grains to help them understand climate change?
    12·2 answers
  • Which term refers to how often a person works out?
    6·1 answer
  • The apparent brightness of stars in general tells us nothing about their distances; we cannot assume that the dimmer stars are f
    11·1 answer
  • How to Estimate your age in seconds ?<br><br><br><br><br><br><br><br><br>No Spamming ~​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!