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kobusy [5.1K]
2 years ago
13

Under steady state, a compressor is used to increase the pressure of an ideal gas air from 100 kPa to 1 MPa. Meanwhile the tempe

rature is also raised from 300 K to 500 K. To be safe, a separate stream of water is used to cool the air down to 320 K while the pressure of air remains unchanged during the cooling process. The temperature of the cooling water increases from 15°C to 30°C, while the pressure of the cooling water remains the same at 1 bar approximately. Assume the kinetic and potential energy change is negligible, there is no stray heat transfer from the heat exchanger to the surroundings.Draw a p-v diagram, one for air identify state 1 to 3 on air p-v diagram. Please show work for how to obtain relative pressures and temperatures for this p-v diagram.
Physics
1 answer:
Art [367]2 years ago
4 0

Answer:

‍♀️

Explanation:

...

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A packing crate rests on a horizontal surface. It is acted on by three horizontal forces: 600 N to the left, 200 N to the right,
egoroff_w [7]

Answer:

The resultant force would (still) be zero.

Explanation:

Before the 600-N force is removed, the crate is not moving (relative to the surface.) Its velocity would be zero. Since its velocity isn't changing, its acceleration would also be zero.

In effect, the 600-N force to the left and 200-N force to the right combines and acts like a 400-N force to the left.

By Newton's Second Law, the resultant force on the crate would be zero. As a result, friction (the only other horizontal force on the crate) should balance that 400-N force. In this case, the friction should act in the opposite direction with a size of 400 N.

When the 600-N force is removed, there would only be two horizontal forces on the crate: the 200-N force to the right, and friction. The maximum friction possible must be at least 200 N such that the resultant force would still be zero. In this case, the static friction coefficient isn't known. As a result, it won't be possible to find the exact value of the maximum friction on the crate.

However, recall that before the 600-N force is removed, the friction on the crate is 400 N. The normal force on the crate (which is in the vertical direction) did not change. As a result, one can hence be assured that the maximum friction would be at least 400 N. That's sufficient for balancing the 200-N force to the right. Hence, the resultant force on the crate would still be zero, and the crate won't move.

6 0
3 years ago
What does a trench form?What happens here?
Vinvika [58]
A hole, and people die if they fall in there.
8 0
3 years ago
What force is required to accelerate a 1,000 kg car 5 m/s2?
marysya [2.9K]
F = ma
F = (1000 kg)•(5 m/s^2)
F = 5000 N
5 0
2 years ago
You see a lightning bolt flash in the distant sky. You hear the corresponding thunder 6.8 seconds later. If the temperature is 2
Anna35 [415]

Answer:

Distance = 2.4\ km

Explanation:

Given

Time (t) = 6.8s

Temperature = 28C

Required

Determine the distance at which the lighting struck

First, we need to determine the speed at which the lighting struck because the peed of sound varies with temperature.

At about 28C, the speed of sound is 346m/s

So, we have the following:

Speed = 346m/s

Time = 6.8s

Distance is calculated as thus:

Distance = Speed * Time

Distance = 346m/s * 6.8s

Distance = 2352.8

Divide by 1000 to get distance equivalent in kilometers

Distance = \frac{2352.8km}{1000}

Distance = 2.3528km

Distance = 2.4\ km ---- Approximated

7 0
3 years ago
Is time real<br><br> If everything is relative to gravity
kozerog [31]

Answer: yes time is real because though everything is relative to gravity they mean material things while time isn't a material thing making it different from gravity and leaving it as its own entity.

4 0
3 years ago
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