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
kari74 [83]
3 years ago
13

The membrane of a living cell can be approximated by a parallel-plate capacitor with plates of area 4.50×10−9 m2 , a plate separ

ation of 8.1×10−9 m , and a dielectric with a dielectric constant of 4.6.What is the energy stored in such a cell membrane if the potential difference across it is 7.55×10−2 V
Physics
1 answer:
Marizza181 [45]3 years ago
6 0

The energy stored in the membrane is 6.44\cdot 10^{-14} J

Explanation:

The capacitance of a parallel-plate capacitor is given by

C=\frac{k\epsilon_0 A}{d}

where

k is the dielectric constant of the material

\epsilon_0 is the vacuum permittivity

A is the area of the plates

d is the separation between the plates

For the membrane in this problem, we have

k = 4.6

A=4.50\cdot 10^{-9} m^2

d=8.1\cdot 10^{-9} m

Substituting, we find its capacitance:

C=\frac{(4.6)(8.85\cdot 10^{-12})(4.50\cdot 10^{-9})}{8.1\cdot 10^{-9}}=2.26\cdot 10^{-11} F

Now we can find the energy stored: for a capacitor, it is given by

U=\frac{1}{2}CV^2

where

C=2.26\cdot 10^{-11} F is the capacitance

V=7.55\cdot 10^{-2} V is the potential difference

Substituting,

U=\frac{1}{2}(2.26\cdot 10^{-11} F)(7.55\cdot 10^{-2})^2=6.44\cdot 10^{-14} J

Learn more about capacitors:

brainly.com/question/10427437

brainly.com/question/8892837

brainly.com/question/9617400

#LearnwithBrainly

You might be interested in
A circuit has a 9.0 V power supply and two 15 Ω resistors connected in parallel. what is the voltage across each resistor?
Flauer [41]

Answer:

B. 9.0 V

Explanation:

In parallel circuits, the voltage across each circuit is the same across each component, which is also equal to the total voltage of the power supplied. So in this case, the voltage across each resistor is still 9.0V.

The voltage only changes when the resistors can connected in series.

3 0
3 years ago
PLEASE HELP!!!! WILL GIVE BRAINLIEST!!!!
Svetach [21]
There’s no image ???
4 0
3 years ago
Which of the following is NOT a correct statement?*
lozanna [386]

AnswerAmontons's law. If the temperature is increased, the average speed and kinetic energy of the gas molecules increase. ... If the gas volume is decreased, the container wall area decreases and the molecule-wall collision frequency increases, both of which increase the pressure exerted by the gas (Figure 1).:

Explanation:

5 0
3 years ago
According to the _______ the amount of energy in the universe doesn't change.
balandron [24]
The answer is B, Law of Kinetic Energy
6 0
3 years ago
Read 2 more answers
What is the wavelength of light (nm) that has a frequency of 6.44 x 1013 s-1?
lesantik [10]
4660

Hope this helped!
STSN
4 0
3 years ago
Read 2 more answers
Other questions:
  • Most savage races do not understand how the Galaxy works. Let's see how well you humans interpret a simple observation. The fact
    13·1 answer
  • What is convection ?
    5·2 answers
  • Given a temperature of 25 Kelvin, what is the approximate temperature in degrees Celsius?
    10·2 answers
  • An 0.80-m aluminum bar is held with its length parallel to the east-west direction and dropped from a bridge. Just before the ba
    6·1 answer
  • What is the average speed of a car that travels 15 km in 4000. seconds?
    10·1 answer
  • What is the mass of an object moved with a force of 540 N at an acceleration of 7.74 m/s2?
    5·2 answers
  • I need help with these questions
    8·1 answer
  • What provides The energy needed to fill the water cycle
    10·1 answer
  • How does lightning occur?​
    14·1 answer
  • How do I calculate the amount of work done using the information on the graphs given?​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!