5. Кульки із сталі, чавуну, міді і латуні мають однакові розміри. Яка з них має

Nerve impulses are carried along axons, the elongated fibers that transmit neural signals. We can model an axon as a tube with a

jeka94

Answer:

The resistance of the axon is $1.27\times 10^7\ \Omega$ .

Explanation:

Given that,

Inner diameter of the model of an axon, $d=10\ \mu m$

Radius of the model, $r=5\ \mu m=5\times 10^{-6}\ m$

Resistivity of the fluid inside the tube wall, $\rho=0.5\ \Omega -m$

Length of the axon, l = 2 mm = 0.002 m

We know that the resistance in terms of resistivity of an object is given by :

$R=\rho\dfrac{l}{A}\\\\R=0.5\times \dfrac{0.002}{\pi (5\times 10^{-6})^2}\\\\R=1.27\times 10^7\ \Omega$

So, the resistance of the axon is $1.27\times 10^7\ \Omega$ . Hence, this is the required solution.

8 0

3 years ago

A Sound wave has a frequency of 192 HZ and travels across a football field (91.4m) in 2 seconds. what is the wavelength of the s

igor_vitrenko [27]

The wavelength of the sound wave is 0.24 m

Explanation:

First of all, we calculate the speed of the wave, which is the ratio between the distance covered by the wave and the time taken:

$v=\frac{d}{t}$

where, for the wave in this problem

d = 91.4 m

t = 2 s

Substituting,

$v=\frac{91.4}{2}=45.7 m/s$

Now we can find the wavelength of the wave by using the wave equation:

$v=f \lambda$

where

v is the speed of the wave

f is its frequency

$\lambda$ is the wavelength

For the wave here,

f = 192 Hz

v = 45.7 m/s

Solving for the wavelength,

$\lambda = \frac{v}{f}=\frac{45.7}{192}=0.24 m$

Learn more about waves:

brainly.com/question/5354733

brainly.com/question/9077368

#LearnwithBrainly

3 0

3 years ago

7. Who provided evidence for the existence of an atomic nucleus?

andreyandreev [35.5K]

Answer: Ernest Rutherford

Explanation:

Ernest Rutherford discovered the nucleus of the atom in 1911. He sent a beam of alpha particles toward gold foil and observed the way the particles were deflected by the gold atoms.

(please mark me brainliest)

4 0

3 years ago

The manipulated variable is plotted on the horizontal axis

tatuchka [14]

True.

Manipulated variable or also called the controlled variables are variables in which you regulate. Manipulate or as said control. By this you want to certain the outcome of a certain experiment. Making it close to which you want it or desired it to be, possibly. Characteristics could be: 
1. You are able to have govern or a certain variable is controllable. 
2. The outcome or effect of a particular variable was what you were determining or were testing with high probability
3. You can either increase or decrease the level of which the variable could take effect on a dependent variable.

8 0

3 years ago

6. A football is kicked with an initial speed of 10.2 m/s at an angle of 40.00 above the horizontal. It lands on the ground 2.12

igor_vitrenko [27]

Answer:

7.81 m/s

Explanation:

Given,

initial speed, u = 10.2 m/s

angle of inclination, θ = 40°

time, t = 2.12 s

Horizontal component of the velocity:

$u_x = u cos \theta$

$u_x = 10.2\times cos 40^0$

$u_x = 7.81 m/s$

In projectile motion horizontal component of the velocity remain same at every point because there is no acceleration.

So, Velocity at the Pinnacle is equal to 7.81 m/s

7 0

3 years ago