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
Luda [366]
3 years ago
7

Impedance plethysmography is a technique that can be used to detect thrombosis--the presence of clots in a blood vessel--by meas

uring the electrical resistance of a limb, such as the calf of the leg. In a typical clinical setting, a current of 200 μA is passed through the leg from the upper thigh to the foot. The voltage is measured at two points along the calf separated by 13 cm. Part A:
If the voltage measured is 17 mV, what is the resistance of the calf between the electrodes?

Part B:

If the average calf diameter between the electrodes is 12 cm, what is the average resistivity of this part of the leg?
Physics
1 answer:
likoan [24]3 years ago
4 0

Answer:

a) The resistance of the calf between the electrodes is 85\Omega

b) The average resistivity of this part of the leg is 57.81m\Omega/cm^{3}

Explanation:

Hi

a) Using Ohm's law V=IR, solving for R, we obtain R=\frac{V}{I}=\frac{17mV}{200uA}=85\Omega

b) The volume of the calf is like a cylinder, so Vol=\pi r^{2}h, with h=13cm and r=d/2=6cm, therefore Vol=\pi (6cm)^{2}(13cm)=468\pi cm^{3}. Then we can use R_{av}=\frac{R}{Vol} =\frac{85\Omega}{468\pi cm^{3}} =0.05781\Omega /cm^{3}=57.81m\Omega/cm^{3}, this is the average resistivity of this part of the leg.

You might be interested in
A .025 kg bullet is moving at 350 m/s when it hits and then passes through a 7 kg block of wood. After the bullet passes through
slamgirl [31]

Answer:

The final velocity of the wooden block is equal to 1.035 m/s

Explanation:

Given that mass of bullet = m_{b} = 0.025kg

                Mass of wood = m_{w} = 7kg

               Initial velocity of bullet = u_{b} = 350m/s

              Final velocity of bullet = v_{b} = 60m/s

               Initial velocity of wood = o

               Final velocity of wood = v_{w]

   Here momentum is conserved so initial momentum = final momentum

            m_{b}u_{b} = m_{b} v_{b} + m_{w}v_{w} .

    Upon substituting these values in above equation , we get

        v_{w} = 1.035m/s.

7 0
3 years ago
What are the horizontal and vertical components of a lizard’s displacement if it has climbed 7m directly up a tree?
madam [21]

Answer:

The horizontal component is zero.

The vertical component is 7\sin\theta

Explanation:

Given that,

The lizard climb 7m directly up on a tree.

We know that,

The horizontal component is

x=\cos\theta

The vertical component is

y=\sin\theta

If the lizard climb 7m directly up on a tree then,

We need to find the components

Using given data

The horizontal component of lizard is

x=0

The vertical component is

y=7\sin\theta

Hence, The horizontal component is zero.

The vertical component is 7\sin\theta

7 0
3 years ago
A ball is thrown upward from an initial height of 1.5m the ball reaches a height of 5m then falls to the ground . What Is the di
jeka94

Answer:

The distance traveled by the ball is 8.5 m

Explanation:

Initial height of the ball, h₁ = 1.5 m above the ground

final height of the ball, h₂ = 5m

Upward distance = distance traveled by the ball from a height of 1.5m to 5m = 5m - 1.5m = 3.5 m

Downward distance = distance traveled by the ball from 5m height to the ground =5m - 0 = 5m

Total distance traveled = upward distance + downward distance

Total distance traveled = 3.5 m + 5m = 8.5 m

Therefore, the distance traveled by the ball is 8.5 m

4 0
3 years ago
PLEASE HELP! DUE DATE IS TODAY
g100num [7]

Answer:

<u>Question 2</u>

<u>Part (a)</u>

Chlorine:  type of compound = chloride

Oxygen:  type of compound = oxide

<u>Part (b)</u>

The iron reacts with water and oxygen to form rust.

A water molecule is made up of two hydrogen atoms joined to one oxygen atom:  Di-hydrogen oxide.

<u>Question 3</u>

This circuit is in parallel.

The current in a parallel circuit splits into different branches then combines again before it goes back into the supply.

We are told that A₁ = 0.8 A

As the lamps have <u>equal resistance</u>, the current splits equally:

A₂ = 0.4 A

A₃ = 0.4 A

Then combines again:

A₄ = 0.8 A

4 0
2 years ago
A wheel with moment of inertia 25 kg. m2 and angular velocity 10 rad/s begins to speed up, with angular acceleration 15 rad/sec2
Pani-rosa [81]

Answer:

(A) Angular speed 40 rad/sec

Rotation = 50 rad

(b) 37812.5 J

Explanation:

We have given moment of inertia of the wheel I=25kgm^2

Initial angular velocity of the wheel \omega _0=10rad/sec

Angular acceleration \alpha =15rad/sec^2

(a) We know that \omega =\omega _0+\alpha t

We have given t = 2 sec

So \omega =10+15\times  2=40rad/sec

Now \Theta =\omega _0t+\frac{1}{2}\alpha t^2=10\times 2+\frac{1}{2}\times 15\times 2^2=50rad

(b) After 3 sec \omega =10+15\times 3=55rad/sec

We know that kinetic energy is given by Ke=\frac{1}{2}I\omega ^2=\frac{1}{2}\times 25\times 55^2=37812.5J

7 0
3 years ago
Other questions:
  • The friction force between a bag and the floor is 4 N. what is the net force acting on the bag? What is the acceleration of the
    11·1 answer
  • A capacitor consists of two closely spaced metal conductors of large area, separated by a thin insulating foil. it has an electr
    10·1 answer
  • 2 examples of balanced forces
    6·1 answer
  • Color is unreliable for identifying minerals because
    11·1 answer
  • Question 7<br> (01.01 MC)<br> What is the difference between a hypothesis and a theory?
    15·1 answer
  • An initially stationary object experiences an acceleration of 6 m/s2 for a time of 15 s. How far will it travel during that time
    11·1 answer
  • A magnetic hockey puck (0.40 kg) hits another hockey puck (0.40 kg) at rest and both travel together to the right at 8.0 m/s. Ho
    12·2 answers
  • A 10 N force and an 18 N force act in the same direction on an object. What is the net force on the object?
    14·1 answer
  • State the reason why the magnetic field strength of a magnet is greatest at the poles<br>​
    10·1 answer
  • HI can anybody tell me what newtons first law is pls don't make it sound too professional pls tyy
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!