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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

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A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surfac
Paladinen [302]

Answer:

1.  λ = 5.60 m , 2.  T = 5.80 s  3.  v = 0.966 m/s   4.  A = 0.315 m

Explanation:

1. The definition of wavelength is the distance between two consecutive maximums or minimums, so that the wave is repeated, in this case they give us the distance between two consecutive maximums, therefore

    λ = 5.60 m

2. the period is the time it takes for the wave to start repeating itself, going through the same point. They give time to go from the highest point to the lowest point, which is the time for half a wavelength, so the time for a wavelength is

     T = 2 t

     T = 2 2.90

     T = 5.80 s

3. For all waves the speed is the product of the wavelength by the frequency and the frequency is the inverse of the period

    v = λ f

    f = 1 / T

   v =  λ / T

   v = 5.60 / 5.80

   v = 0.966 m / s

4. The amplitude of the wave is the value of the zero displacement point to the maximum displacement point, give the value between the maximum and minimum displacement

     A = d / 2

     A = 0.63 / 2

     A = 0.315 m

8 0
3 years ago
Which description correctly summarizes how an electric motor causes an axle to turn?
Tasya [4]

Answer:

The poles of the magnetic field generated around the armature are attracted to the opposite poles of the permanent magnet. As the opposite poles align, the commutator reverses the current direction so like poles are aligned and the armature continues to spin.

Explanation:

3 0
3 years ago
Rutherford's gold-foil experiment led him to conclude that
erica [24]

Answer:

C. a dense region of positive charge existed somewhere in the atom.

Explanation:

Physicist Ernest Rutherford created the gold foil experiment in which he shot a beam of alpha particles at a sheet of gold foil, which then sent a  few of the particles flying after they were deflected. Based on the information gathered after completing this experiment, Rutherford concluded that a dense region of positive charge existed somewhere in the atom.

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

3 0
3 years ago
Brainliest for correct answer! :)
Katena32 [7]

Answer:

1. 300.15

2. 873.15

3. 221.95

1. -243.15

2. -210.85

3. 295.17

5 0
3 years ago
I need this right ASAP!!! plz plz plz
UkoKoshka [18]

Answer:

The answer is D

Nucleus is neutral

8 0
3 years ago
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