Question

A typical human cell is approximately 11 μm in diameter and enclosed by a membrane that...

A typical human cell is approximately 11 μm in diameter and enclosed by a membrane that is 4.3 nm thick. To simplify the calculations, model the cell as a sphere.

1)What is the volume of the cell? (Express your answer to two significant figures.)

700 μm3

2)What is the volume of the cell membrane? (Express your answer to two significant figures.)

3)What percent of the cell volume does its membrane occupy? (Express your answer to two significant figures.)

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A typical human cell is approximately 10 μm in diameter and enclosed by a membrane that...
A typical human cell is approximately 10 μm in diameter and enclosed by a membrane that is 4.2 nm thick. To simplify the calculations, model the cell as a sphere. 1)What is the volume of the cell? (Express your answer to two significant figures.) What is the volume of the cell membrane? (Express your answer to two significant figures.) What percent of the cell volume does its membrane occupy? (Express your answer to two significant figures.)
1. Physical units in mechanics are usually some combination of the dimensions time T, mass M,...
1. Physical units in mechanics are usually some combination of the dimensions time T, mass M, and length L. Consider the physical quantities ?, ?, ?, ?, and ? with dimensions [?]=M, [?]=L, [?]=LT^−1, [?]=LT^−2, and [?]=T. Enter the dimensional expression of the quantity on the right-hand side of each equation. Your answers may contain only M, L, T, and exponents. Assume that each of the following equations is dimensionally consistent. (a) K=1/2mv^2 [K] = (b) p=mv [p]= (c) k=-ma/r...
A typical cell has a membrane potential of -70 mV, meaning that the potential inside the...
A typical cell has a membrane potential of -70 mV, meaning that the potential inside the cell is 70 mV less than the potential outside due to a layer of negative charge on the inner surface of the cell wall and a layer of positive charge on the outer surface. This effectively makes the cell wall a charged capacitor. Because a cell's diameter is much larger than the wall thickness, it is reasonable to ignore the curvature of the cell...
Problem 18.77: Potential in human cells. Some cell walls in the human body have a layer...
Problem 18.77: Potential in human cells. Some cell walls in the human body have a layer of negative charge on the inside surface and a layer of positive charge of equal magnitude on the outside surface. Suppose that the charge density on either surface is ± 0.50×10−3 C/m2, the cell wall is 5.0 nm thick, and the cell-wall material is air. Part A Find the magnitude of E⃗ in the wall between the two layers of charge. Express your answer...
Some cell walls in the human body have a layer of negative charge on the inside...
Some cell walls in the human body have a layer of negative charge on the inside surface and a layer of positive charge of equal magnitude on the outside surface. Suppose that the charge density on either surface is ± 0.50×10−3 C/m2, the cell wall is 5.1 nm thick, and the cell-wall material is air. Notes about Problem 18.77 and a Hint for Part D: The cell wall/membrane creates a separation of charge between the inside and outside of a...
Hereditary spherocytosis (HS) is a genetic disorder of the red blood cell membrane which causes the...
Hereditary spherocytosis (HS) is a genetic disorder of the red blood cell membrane which causes the red blood cells to be spherical in shape instead of the normal shape which is a flatter biconcave disc. This cell deformity can lead to anaemia, jaundice and other complications. The diameter of the red blood cells of a paticular HS patient are measured using a technique of laser diffraction to be 7.9 ± 0.3 μm. The volume V of a sphere is given...
A red blood cell may carry an excess charge of about -2.5×10^−12 C distributed uniformly over...
A red blood cell may carry an excess charge of about -2.5×10^−12 C distributed uniformly over its surface. The cells, modeled as spheres, are approximately 8 μm in diameter and have a mass of 9.0×10^−14 kg. 1) How many excess electrons does a typical red blood cell carry? (Express your answer to two significant figures.) 2) Does the mass of the extra electrons appreciably affect the mass of the cell? To find out, calculate the ratio of the mass of...
Many cells in the body have a cell membrane whose inner and outer surfaces carry opposite...
Many cells in the body have a cell membrane whose inner and outer surfaces carry opposite charges, just like the plates of a parallel-plate capacitor. Suppose a typical cell membrane has a thickness of 8.5×10−9 m , and its inner and outer surfaces carry charge densities of -6.3×10−4 C/m2 and +6.3×10−4 C/m2 , respectively. In addition, assume that the material in the cell membrane has a dielectric constant of 5.5. 1. Find the direction of the electric field within the...
The diameter of the nucleus is about 11 fm . A simple model of the nucleus...
The diameter of the nucleus is about 11 fm . A simple model of the nucleus is that protons and neutrons are confined within a one-dimensional box of length 11 fm . Part A What is the first energy level, in MeV, for a proton in such a box? Express your answer using three significant figures. Part B What is the second energy level, in MeV, for a proton in such a box? Express your answer using three significant figures....
A 2.0-cm-diameter metal sphere is glowing red, but a spectrum shows that its emission spectrum peaks...
A 2.0-cm-diameter metal sphere is glowing red, but a spectrum shows that its emission spectrum peaks at an infrared wavelength of 2.1 μm . Assume e=1. Part A How much power does the sphere radiate? Express your answer to two significant figures and include the appropriate units.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT