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
marshall27 [118]
3 years ago
14

Suppose that the resistance between the walls of a biological cell is 7.0 × 109 Ω. (a) What is the current when the potential di

fference between the walls is 80 mV? (b) If the current is composed of Na+ ions (q = +e), how many such ions flow in 0.85 s?
Biology
1 answer:
DIA [1.3K]3 years ago
7 0

Answer:

Explanation:

Using Ohm's law

V ( voltage) = I (current A) × Resistance R in ohms

R = 7.0 × 10⁹Ω

V = 80 mV = 80 / 1000 = 0.08 V

0.08 V = I × 7.0 × 10⁹Ω

a) I = 0.08 V / 7.0 × 10⁹Ω = 1.142857 × 10 ⁻¹¹ A

b) quantity of charge = I × t = 1.142857 × 10 ⁻¹¹ A × 0.85 s = 9.7142857 × 10⁻¹² C

number of Na⁺ ions ( q = +e) = 9.7142857 × 10⁻¹² C / 1.6 × 10⁻¹⁹ C = 60714285.714 Na⁺ ions

You might be interested in
Protein supplies approximately __________ percent of a human's typical energy needs.
andreyandreev [35.5K]
A human needs approximately 2-5 percent of protein for the typical energy needed daily. Protein is one of the most important building blocks in the body. It helps the bones, muscles, skin, blood, and cartilage. A humans nails and hair are made of protein. The protein your body uses also repairs tissues and build new ones. 
5 0
3 years ago
Which biome would contain the most trees?
ioda
The answer is Taiga
Hope this helps:D
Have a great rest of a brainly day! (pls mark me brainliest)
9 0
3 years ago
Who challenged the idea that insects appeared spontaneously in decomposing meat?
ladessa [460]
Francesco Redi was the first scientist to disprove and challenge the spontaneous generation theory. He experimented on how flies distributed their eggs on the meat which caused flies to arose. Thank you for your question. Please don't hesitate to ask in Brainly your queries. 
3 0
3 years ago
A lawn mower is an example of a compound machine.
lyudmila [28]
Yes the Lawn mower is an example of a Compound machine
8 0
3 years ago
Read 2 more answers
Where are deep ocean trenches formed?
alina1380 [7]
<span>Well, deep ocean trenches form on a specific type of plate boundary called a subduction zone, and these zones occur when an ocean plate collides with another ocean plate. Hope I helped.</span>
8 0
3 years ago
Read 2 more answers
Other questions:
  • If we increase energy, what happens to temperature ?
    11·2 answers
  • 7. As plants like corn made their way
    9·1 answer
  • Define "water pollution".
    11·2 answers
  • Proteins on the surface of vesicles determine where the vesicles go. Which cell organelle provides the instructions for these pr
    5·2 answers
  • Where does nad+ deliver electrons compared to fad in cellular respiration?
    5·1 answer
  • Need help fast. I really dont understand this
    12·1 answer
  • Why is the phylum porifera classified under parazoa​
    12·1 answer
  • A researcher found a beautiful plant while traveling in Alaska and collected its seeds. When she came back to Florida, she soake
    15·1 answer
  • If Ava drops a 5 kg ball off a 20 meter building and Clayton drops a 5 kg ball
    11·1 answer
  • I WILL GIVE BRAINLIEST
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!