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2 years ago

Which part of the neuron receives messages from other neurons?

Physics

1 answer:

kow [346]2 years ago

3 0

Answer:

Explanation:

the dendrites is a part of the neuron receives messages from other neurons. Dendrites extend out from the cell body and receive messages from other nerve cells

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What fraction of the volume of an iceberg (density 917 kg/m3) would be visible if the iceberg floats in (a) the ocean (salt wate

kondor19780726 [428]

Answer:

a) 10.4% b) 8.3%

Explanation:

According to Archimedes' principle, any object submerged in a liquid, receives an upward force (called buoyant force) numerically equal to the weight of the volume removed by the liquid.

When this force is equal to the force of gravity on the object (which we call weight, always downward) the object floats in the liquid.

Let's see what happens in the two situations we have:

a) salt water (density 1024 Kg/m³)

We can express the force of gravity on the iceberg, as follows:

Fg = mice*g = ρice*Vice*g

For the Fb (buoyant force) , we have:

Fb= ρsw*Vsub*g, where Vsub, is the fraction of the iceberg volume that is submerged.

So we can replace Vsub as follows:

Vsub = k Vice, where k is the fraction submerged, i.e. 0<k<1.

Therefore, if we need that the iceberg float, we need that Fg=Fb, as follows:

Fg= ρice*Vice*g = Fb =ρsw*k*Vice*g (1)

Simplifying common terms, we have:

ρice/ρsw = k ⇒917 kg/m³ / 1,024 kg/m³ = 0.896

This means that 89.6% of the volume is submerged, i.e. , is not visible, so the visible percentage is just the difference between 100% and 89.6%:

Vvis = 100% - 91,7% = 10.4%

b) For fresh water, we can do the same procedure, repeating (1), with the value for density of fresh water, as follows:

Fg= ρice*Vice*g = Fb =ρsw*k*Vice*g

Simplifying common terms, we have:

ρice/ρsw = k ⇒917 kg/m³ / 1,000 kg/m³ = 0.917

This means that 91.7 % of the volume is submerged, i.e. , is not visible, so the visible percentage is just the difference between 100% and 91.7%:

Vvis = 100% - 91.7 = 8.3%

3 0

4 years ago

At which moon position would a person on Earth see the entire half of the moon(full-moon)?

jeka94

Sun-earth-moon in a straight line. Earth in the 'middle'.

3 0

3 years ago

Read 2 more answers

Consider a taut inextensible string. You shake the end of the string with some frequency, causing a wave to travel down the stri

masha68 [24]

Answer:

Part 1:

Option B is correct (It will remain unchanged).

Part 2:

Option C is correct (It will increase by a factor of √ 2)

Part 3:

Option E is correct (It will be half as fast/long.)

Part 4:

Option C is correct (It will increase by a factor of √ 2.)

Explanation:

Formula we are going to use:

V=f*λ

Where:

V is the speed of Sound

f is the frequency of wave

λ is the wavelength.

The speed of wave , tension and linear density have following relation:

$V=\sqrt{F/\rho}$

Where:

V is the speed of Sound (Initial)

F is the tension in string (Initial)

$\rho$ is the linear density of string (Constant)

Terms:

V' is the new speed

f' is the new frequency

λ' is the wavelength

Solution:

Part 1:

From $V=\sqrt{F/\rho}$ :

Speed of Sound is independent of the frequency of shaking so speed well remain unchanged.

Option B is correct (It will remain unchanged)

Part 2:

If F'=2F then

$V=\sqrt{F/\rho}$

$V'=\sqrt{F'/\rho}\\V'=\sqrt{2F/\rho}\\V'= \sqrt{2} * \sqrt{F/\rho}\\V'=\sqrt{2}V$

Option C is correct (It will increase by a factor of √ 2)

Part 3:

Formula we are going to use:

V=f*λ

Given f'=2f,

Even though frequency is doubled we will keep velocities same. V=V' in order to find the changing wavelength.

V'=f'*λ'

f*λ=f'*λ'

f*λ=2f*λ'

Solving above Equation:

λ'=λ/2

Option E is correct (It will be half as fast/long.)

Part 4:

T'=2T means $V'=\sqrt{2}V$ (From Part 1)

f'=f

Now:

V'=f'*λ'

$\sqrt{2}f*\lambda=f'*\lambda '\\\sqrt{2}f*\lambda=f*\lambda '\\ \lambda '=\sqrt{2}*\lambda$

Option C is correct (It will increase by a factor of √ 2.)

5 0

3 years ago

The more mass an object has,the less inertia the object has. True or False

dedylja [7]

Answer:

This is true. objects that have a greater mass has greater interia. which also means objects that have a less mass has also less interia.

Explanation:

i hope this helps!!!

7 0

3 years ago

The isotope of an atom containing 40 protons and 51 neutrons suddenly has 2 neutrons added to it. What isotope is created?

timama [110]

<span>The isotope of an atom containing 40 protons and 51 neutrons suddenly has 2 neutrons added to it
That is X-93 so it will be
</span><span>Zirconium-93
</span>hope it helps

7 0

3 years ago