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
tatyana61 [14]
2 years ago
13

A cell membrane consists of an inner and outer wall separated by a distance of approximately 10 nm. Assume that the walls act li

ke a parallel plate capacitor, each with a charge density of 10-5 C/m2, and the outer wall is positively charged. Although unrealistic, assume that the space between cell wall is filled with air. What is the magnitude of the electric field between the membranes
Physics
1 answer:
ser-zykov [4K]2 years ago
3 0

Answer:

E = 1.1 10⁶ N / C

Explanation:

In this case they indicate that we can approximate the membrane as a parallel plate capacitor, we can use

            E = \frac{\sigma}{\epsilon_o }

note that in this case the electric field created by each plate goes in the same direction, they are added

let's calculate

            E =  \frac{10^{-5}}{8.85 \ 10^{-12}}

            E = 1.1 10⁶ N / C

You might be interested in
Which of the following are ways the rising human population can lower their impact on the Earth's spheres and climate change? Se
Tju [1.3M]

a and c because its right im out of college

3 0
3 years ago
A mass of 240 grams oscillates on a horizontal frictionless surface at a frequency of 2.5 Hz and with amplitude of 4.5 cm.
mr_godi [17]

Answer:

(a) The spring constant is 59.23 N/m

(b) The total energy involved in the motion is 0.06 J

Explanation:

Given;

mass, m = 240 g = 0.24 kg

frequency, f = 2.5 Hz

amplitude of the oscillation, A = 4.5 cm = 0.045 m

The  angular speed is calculated as;

ω = 2πf

ω = 2 x π x 2.5

ω = 15.71 rad/s

(a) The spring constant is calculated as;

\omega = \sqrt{\frac{k}{m} } \\\\\omega ^2 = \frac{k}{m} \\\\k = m\omega ^2\\\\where;\\\\k \ is \ the \ spring \ constant\\\\k = (0.24) \times (15.71)^2\\\\k = 59.23 \ N/m

(b) The total energy involved in the motion;

E = ¹/₂kA²

E = (0.5) x (59.23) x (0.045)²

E = 0.06 J

5 0
3 years ago
Where does all of this energy come from
Amiraneli [1.4K]

Answer: All of our energy comes from the sun, which is our nearest star. The sun sends out huge amounts of energy through its rays every day. We call this energy solar energy or radiant energy. Without the sun, life on earth would not exist, since our planet would be totally frozen.

6 0
3 years ago
A person paddles down river at an average speed of 4km
adoni [48]

Nice paddling.  Thanks for sharing.
Do you have some question to ask ?

7 0
3 years ago
Read 2 more answers
Taden has found a table of the atmospheric layers of the Sun. However, he can’t make out the names of the layers in the chart.
zhenek [66]

The sun is a ball of hot gases containing different kinds of elements at different cores. It has a very high temperature that radiates all throughout the Milky Way galaxy. The sun has three main parts; photosphere, chromospheres and corona. The outer core of a star located at the chromospheres contains mostly of hydrogen. Inside the hydrogen is helium then carbon, oxygen, neon, magnesium silicon and the inert gas. The photosphere is scattered by the loose electrons in the corona’s plasma.

7 0
3 years ago
Read 2 more answers
Other questions:
  • A cylinder of compressed gas has a pressure of 488.2 kPa. The next day the cylinder of gas has a
    14·1 answer
  • Does current in Helmholtz coils flow in the same or opposite direction through each coil? Explain.
    12·1 answer
  • A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of v0 = 15.0 m/s. The cliff i
    12·1 answer
  • Does the mass of a supermassive black hole correlate with any other part of a galaxy?
    13·1 answer
  • A cart of mass M = 2.40 kg can roll without friction on a level track. A light string draped over a light, frictionless pulley c
    13·1 answer
  • The components of a 10.8-meters-per-second velocity at an angle of 34.° above the horizontal are
    5·1 answer
  • NEED THE ANSWER ASAP When an object is not in motion, it can still have a form of energy. What form of energy does an object hav
    13·1 answer
  • How dose storing waste underground can be effected by ground water in aquifers<br><br>​
    11·1 answer
  • These has two questions, any help would be much appreciated. Ignore the current answers.
    11·1 answer
  • A motorist travels 130 km in 2 hours.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!