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
Elden [556K]
3 years ago
7

Most of the resistance of the human body comes from the skin, as the interior of the body contains aqueous solutions that are go

od electrical conductors. For dry skin, the resistance between a person's hands is measured at typically 500 kΩ. The skin varies in thickness, but on the average it is about 2.0 mm thick. We can model the body between the hands as a cylinder 1.6 m long and 14 cmin diameter with the skin wrapped around it.
(a) What is the resistivity of the skin?
Ω · m

(b) Compare your answer with the internal resistivity of the body, approximately

4.8 Ω · m.

rhoskin
rhointerior
=

How do you explain the fact that the resistance of the skin is about 1000 times greater than the internal resistance of the body, even though the resistivity of the skin is only about 60 times that of the interior of the body?

A )The skin has a smaller cross sectional area.

B )The resistance of an object scales exponentially with respect to the resistivity of the material out of which it is made.

C ) The skin is constantly moistened by biological processes.

D ) Charges can only exist on the surface of conductors.
Physics
1 answer:
ruslelena [56]3 years ago
4 0

Answer:

a) Resistivity=R.A/L

Here, R=500000ohm, L=1.6m, A=2pi* (0.14/2)*0.002 m2=0.00088.........we have converted quantities into SI units

Resistivity=R.A/L

=500000*0.00088/1.6 = 440/1.6= 275 ohm.meter

b) pskin/pinterior =275/4.8=57.3

For second part, correct option is (A), because cross section area is smaller.

You might be interested in
An electromagnetic wave is traveling straight down toward the center of the Earth. At a certain moment in time the electric fiel
Anika [276]

Answer:

North

Explanation:

In an electromagnetic wave, the direction of the wave, the direction of the electric field and the direction of the magnetic field are all perpendicular to each other.

Therefore, we can  find the direction of the magnetic field by using the right hand rule. We have:

- Index finger: direction of motion of the wave --> toward the center of Earth

- middle finger: direction of the electric field --> west

- thumb: direction of the magnetic field --> north

So, the magnetic field points north.

3 0
3 years ago
Why do you think it is a driving force of weather around the world?
Finger [1]

Answer:

The sun.

Explanation:

The sun provides energy for living organisms, and it drives our planet’s weather and climate patterns.

Remember, Earth is spherical and the energy from the sun does not reach all areas with equal intensity. Areas exposed to the sun are directly on the sun’s rays (i.e. those nearest to the equator) and hence, receive greater solar input. In contrast, those in higher latitudes receive sunlight that is spread over a larger area and that has taken a longer path through the atmosphere. As a result, these higher latitudes receive less solar energy.

Also, ocean circulation and precipitation are all factors of weather

4 0
3 years ago
Why does changing the shape of an object have no effect on the density?
iren [92.7K]
Because the object is still made of the same material 
Density is not affected by the weight and shape of an object its affected by how concentrated the atoms are in a given volume 
7 0
3 years ago
The energy generated by the sun travels to Earth as electromagnetic waves of varying lengths. Which statement describes an elect
Paha777 [63]

Answer: 4(45)

Explanation:

It’s not equal

3 0
3 years ago
Read 2 more answers
Two people are each
docker41 [41]

Answer:

the rope should break

Explanation:

she with equal amounts of pulling are on each side then the rope should slowly start to tare apart and snap/break.

hope this helps you

3 0
2 years ago
Other questions:
  • Based on Newton’s prism experiments, what is sunlight made of?
    10·2 answers
  • Which of the following pairs of terms directly relates to the actual brightness of a star?
    9·2 answers
  • The speedometer of a car moving east reads 60 mph. It passes another car that travels west at 60 mph do the cars have the same v
    9·1 answer
  • What is the work done by the electric force to move a 1 c charge from a to b?
    8·1 answer
  • A student sorted mineral samples into two groups: dull and shiny. Which of the following properties did the student use to sort
    6·2 answers
  • after a circuit has been turned off, so it is important to make sure they are discharged before you touch them. Suppose a 120 mF
    5·1 answer
  • A block with a mass of 0.400 kg is connected to a spring, displaced in the positive direction a distance of 50.0 cm from equilib
    6·1 answer
  • What is the mass of a bicycle that has 90 kg.m/s of momentum at a speed of 6 m/s?
    6·1 answer
  • If a lawn mower is pushed with a distance of 30 meters and 12N-m of work is exerted, calculate the force.
    7·1 answer
  • Which of the following could describe the velocity of an object?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!