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
GREYUIT [131]
3 years ago
12

Under certain circumstances, potassium ions (K+) in a cell will move across the cell membrane from the inside to the outside. Th

e potential inside the cell is − 85.5 mV and the potential outside the cell is zero. a. What is the change in the electrical potential energy of a single potassium ion as it moves across the membrane?b. Does the potential energy of the potassium ions increase, decrease, or remain the same as the ions move from the inside to the outside?
Physics
1 answer:
choli [55]3 years ago
3 0

Answer:

1.368\times 10^{-20}\ J

Explanation:

q = Charge in the potassium ion = 19e-18e

e = Charge of electron = 1.6\times 10^{-19}\ C

V_2-V_1 = Change in potential = 0-(-85.5\times 10^{-3})

Change in electric potential is given by

E=q(V_2-V_1)\\\Rightarrow E=(19e-18e)(0-(-85.5\times 10^{-3})\\\Rightarrow E=1.6\times 10^{-19}\times 85.5\times 10^{-3}\\\Rightarrow E=1.368\times 10^{-20}\ J

The energy is 1.368\times 10^{-20}\ J

You might be interested in
When the Earth is closest to the Sun, it is at:
ahrayia [7]

a). Perihelion . . . the point in Earth's orbit that's closest to the Sun.
                            We pass it every year early in January. 


b). Aphelion . . . the point in Earth's orbit that's farthest from the Sun.
                          We pass it every year early in July. 

c). Proxihelion . . . a made-up, meaningless word

d). Equinox . . . the points on the map of the stars where the Sun
                         appears to be on March 21 and September 21.

5 0
3 years ago
An atom that has fewer neutrons than protons and more electrons than protons is a ion
riadik2000 [5.3K]

i think it is an ion

6 0
3 years ago
PLEASE HELP ME.....WILL MARK BRAINLIEST ANSWER
schepotkina [342]
A) gases particles are far apart
8 0
3 years ago
Read 2 more answers
a car initially at rest move with the constant accerates along straght line read after it's spread increase and finally related
nasty-shy [4]

Answer:

32km per hour

Explanation:

Explanation:

In first case v = a t

==> a t = 40 km p h

Now distance covered S1 + S2 + S3

S1 = 1/2 a t^2 and S3 = 1/2 a t^2

But S2 = 3t * 40 = 120 t km

Hence total distance = at^2 + 120 t

Time taken (total) = t + 3t + t = 5 t

Hence average speed = at^2 + 120 t / 5 t

Cancelling t we have at + 120 / 5 = 40 + 120 / 5 = 160/5 = 32 km per hour

8 0
3 years ago
A loop rests in the plane of a page of textbook while a magnetic field is directed into the page. A clockwise current is induced
Sunny_sXe [5.5K]

Answer:

When the magnetic field is tilted so it is no longer perpendicular to the page.

When the magnetic field gets stronger.

When the size of the loop decreases.

Explanation:

According to the Faraday-Lenz law, the change of the magnetic flux over time causes an induced current, this flux is given by:

\Phi_B=BScos\theta

Therefore, there will be a variable magnetic flux, when the magnitude of the magnetic field (B) changes over time, when the area of the loop (S) changes over time and / or when the angle (\theta) between the field and the surface vector changes over time.

8 0
3 years ago
Other questions:
  • What is the absolute value of the horizontal force that each athlete exerts against the ground?
    10·1 answer
  • Define Plateau period.
    10·1 answer
  • What is weightlessness ?​
    9·1 answer
  • T Object]User:
    13·1 answer
  • Leila drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 10 hours. When Leila drov
    13·1 answer
  • A constant net force that has a magnitude of 135.5 N is exerted on a 26.7 kg object that is initially not moving. a. Draw a free
    8·1 answer
  • How many atoms of Oxygen (O) are in 3CO2
    6·1 answer
  • Pls help quick too.................
    15·1 answer
  • . A projectile is launched from a cliff 100m above level ground with a velocity of 30m/s at an
    11·1 answer
  • Would a larger balloon float better or worse than a smaller balloon?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!