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4 years ago

Two fundamental concepts about the ion channels of a resting neuron are that the channels _____.

1 answer:

8 0

<span>Two fundamental concepts about the ion channels of a resting neuron are that the channels </span><span>open and close depending on stimuli and are specific as to which ion can traverse them.

-Hope this helps</span>

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the compressor exerts a pressure of 400 Pa to compress nitrogen gas from 3 L to 1 L. If no heat transfer occurs, how much will t

Triss [41]

Answer:

0.79014 J

Explanation:

According to the first law of thermodynamics:-

$\Delta U = q + w$

Where,

U is the internal energy

q is the heat

w is the work done

From the question,

q = 0 J

The expression for the calculation of work done is shown below as:

$w=P\times \Delta V$

Where, P is the pressure

$\Delta V$ is the change in volume

From the question,

$\Delta V$ = 3 - 1 L = 2 L

P = 400 Pa

The expression for the conversion of pressure in Pascal to pressure in atm is shown below:

P (Pa) = $\frac {1}{101325}$ P (atm)

Given the value of pressure = 43,836 Pa

So,

400 Pa = $\frac {400}{101325}$ atm

Pressure = 0.0039 atm

$w=0.0039\times 2\ atmL$

Also, 1 atmL = 101.3 J

So,

$w=0.0039\times 2\times 101.3\ J=0.79014\ J$ (work is done by the system)

So,

$\Delta U = 0\ J+0.79014\ J =0.79014\ J$

5 0

4 years ago

PLEASE HELP!!!

ladessa [460]

Answer:

the answer is c. [.4r]3d104324p

7 0

3 years ago

Is every solution also a mixture?

aleksandrvk [35]

A mixture consists of two or more components. a solution can consists of a solute dissolved in a solvent or two solvents mixed together, for instance. A mixture can also be two gases (CO2 and O2) mixed together or two solids mixed together (sawdust and chalk).

4 0

4 years ago

What led Marie Curie to draw the following conclusions? (b) A highly radioactive element, aside from uranium, occurs in pitchble

AVprozaik [17]

Making repeated separations of the various substances in the pitchblende, Marie and Pierre used the Curie electrometer to identify the most radioactive fractions. They thus discovered that two fractions, one containing mostly bismuth and the other containing mostly barium, were strongly radioactive.

<h3>What was surprising about pitchblende?</h3>

Since it was no longer appropriate to call them “uranic rays,” Marie proposed a new name: “radioactivity.”

Even more surprising, Marie next found that a uranium ore called pitchblende contained two powerfully radioactive new elements: polonium, which she named for her native Poland, and radium.

<h3>Why is radium more radioactive than uranium?</h3>

It is 2.7 million times more radioactive than the same molar amount of natural uranium (mostly uranium-238), due to its proportionally shorter half-life.

Learn more about highly radioactive elements here:

<h3>brainly.com/question/10257016</h3><h3 /><h3>#SPJ4</h3>

6 0

2 years ago

If 200 grams of water is to be heated from 24.0° C to 100.0° C to make a cup of tea, how much heat must be added?

GalinKa [24]

C -------------------

3 0

3 years ago

Read 2 more answers