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3 years ago

Under what conditions can an ideal gas undergo a change of state without doing external work?

1 answer:

8 0

Nswer

Work done = Pressure * ΔV [ change in volume ] 

If ΔV=0, then no work is done 

Zero work thermodyanamic process is called ' isochoric process.' 

For example if a gas heated in a rigid container: the pressure and temperature 
of the gas will increase, but the volume will remain the same. 

This is called an isochoric thermodynamic process. 

It is actually possible to do work on a system without changing the 
volume, as in the case of stirring a liquid

You might be interested in

A centripetal force of 5.0 newtons is applied to a rubber stopper moving at a constant speed in a horizontal circle. If the same

mezya [45]

Answer:

Both the frequency f and velocity v will increase.

When the radius reduces, the circumference of the circular path becomes smaller which means that more number of revolutions can be made per unit time as long as the force is kept constant; this is an increase in frequency.

Explanation:

The centripetal force acting on a mass in circular motion is given by equation (1);

$F_c=\frac{mv^2}{r}....................(1)$

where m is the mass of the object and r is radius of the circle. From equation one we see that the centripetal force is directly proportional to the square of the velocity and inversely proportional to the radius of the circular path.

However, according to the problem, the force is constant while the radius and the velocity changes. Therefore we can write the following equation;

$\frac{mv_1^2}{r_1}=\frac{mv_2^2}{r_2}......................(2)$

Also recall that m is constant so it cancels out from both sides of equation (2). Therefore from equation we can write the following;

$v_2=\sqrt{\frac{v_1^2r_2}{r_1}} .................(2)$

By observing equation (2) carefully, the ratio $\frac{r_2}{r_1}$ will with the square root increase $v_1$ since $r_2$ is lesser than $r_1$ .

Hence by implication, the value of $v_2$ will be greater than $v_1$ .

As the radius changes from $r_1$ to $r_2$ , the velocity also changes from $v_1$ to $v_2$ .

3 0

3 years ago

Question 2 of 10

emmainna [20.7K]

Answer:

Explanation:

I just did it on apex

8 0

3 years ago

A car travels at a constant speed around a circular track whose radiu is 2.6 km. The goes once arond the track in 360s . What is

AveGali [126]

Answer:

Centripetal acceleration = 0.79 m/s²

Explanation:

Given the following data;

Radius, r = 2.6 km

Time = 360 seconds

Conversion:

2.6 km to meters = 2.6 * 1000 = 2600 meters

To find the magnitude of centripetal acceleration;

First of all, we would determine the circular speed of the car using the formula;

$Circular \; speed (V) = \frac {2 \pi r}{t}$

Where;

r represents the radius and t is the time.

Substituting into the formula, we have;

$Circular \; speed (V) = \frac {2*3.142*2600}{360}$

$Circular \; speed (V) = \frac {16338.4}{360}$

Circular speed, V = 45.38 m/s

Next, we find the centripetal acceleration;

Mathematically, centripetal acceleration is given by the formula;

$Centripetal \; acceleration = \frac {V^{2}}{r}$

Where;

V is the circular speed (velocity) of an object.
r is the radius of circular path.

Substituting into the formula, we have;

$Centripetal \; acceleration = \frac {45.38^{2}}{2.6}$

$Centripetal \; acceleration = \frac {2059.34}{2600}$

Centripetal acceleration = 0.79 m/s²

3 0

3 years ago

Which most accurately describes the path that sound travels??

emmainna [20.7K]

What are the options ?

6 0

3 years ago

List the parts of the electromagnetic spectrum from longest wavelength to shortest wavelength

Lilit [14]

The rays of the electromagnetic spectrum from shortest to longest wavelength are: radio waves, microwaves, infrared rays, optical rays, ultraviolet rays, X-rays, and gamma-rays.

EDIT: He has these backwards, the shortest wavelength is created by Gamma-Rays and the longest is Radiowaves.

 Remember- high energy = short wavelength.

6 0

3 years ago