Answer:
a) P = 2319.6[kPa]; b) 2.6%
Explanation:
Since the problem data is not complete, the following information is entered:
A 1.78-m3 rigid tank contains steam at 220°C. One-third of the volume is in the liquid phase and the rest is in the vapor form. Determine (a) the pressure of the steam, and (b) the quality of the saturated mixture.
From the information provided in the problem we can say that you have a mixture of liquid and steam.
a) Using the steam tables we can see (attached image) that the saturation pressure at 220 °C is equal to:
![P_{sat} =2319.6[kPa]](https://tex.z-dn.net/?f=P_%7Bsat%7D%20%3D2319.6%5BkPa%5D)
![v_{f}=0.001190[m^{3}/hr]\\v_{g}=0.08609[m^{3}/hr]\\](https://tex.z-dn.net/?f=v_%7Bf%7D%3D0.001190%5Bm%5E%7B3%7D%2Fhr%5D%5C%5Cv_%7Bg%7D%3D0.08609%5Bm%5E%7B3%7D%2Fhr%5D%5C%5C)
b) Since the specific volume of the gas and liquid is known, we can find the mass of each phase using the following equation:
![m_{f}=\frac{V_{f} }{v_{f} } \\m_{g}=\frac{V_{g} }{v_{g} } \\where:\\V_{f}=volume of the fluid[m^3]\\v_{f}=specific volume of the fluid [m^3/kg]\\](https://tex.z-dn.net/?f=m_%7Bf%7D%3D%5Cfrac%7BV_%7Bf%7D%20%7D%7Bv_%7Bf%7D%20%7D%20%20%5C%5Cm_%7Bg%7D%3D%5Cfrac%7BV_%7Bg%7D%20%7D%7Bv_%7Bg%7D%20%7D%20%20%5C%5Cwhere%3A%5C%5CV_%7Bf%7D%3Dvolume%20of%20the%20fluid%5Bm%5E3%5D%5C%5Cv_%7Bf%7D%3Dspecific%20volume%20of%20the%20fluid%20%5Bm%5E3%2Fkg%5D%5C%5C)
We know that the volume of the fluid is equal to:
![V_{f}=1/3*V_{total} \\V_{total}=1.78[m^3]\\](https://tex.z-dn.net/?f=V_%7Bf%7D%3D1%2F3%2AV_%7Btotal%7D%20%20%5C%5CV_%7Btotal%7D%3D1.78%5Bm%5E3%5D%5C%5C)
Now we can find the mass of the gas and the liquid.
![m_{f}=\frac{1/3*1.78}{0.001190} \\m_{f}=498.6[kg]\\m_{g}=\frac{2/3*1.78}{0.08609}\\m_{g}=\ 13.78[kg]](https://tex.z-dn.net/?f=m_%7Bf%7D%3D%5Cfrac%7B1%2F3%2A1.78%7D%7B0.001190%7D%20%20%5C%5Cm_%7Bf%7D%3D498.6%5Bkg%5D%5C%5Cm_%7Bg%7D%3D%5Cfrac%7B2%2F3%2A1.78%7D%7B0.08609%7D%5C%5Cm_%7Bg%7D%3D%5C%2013.78%5Bkg%5D)
The total mass is the sum of both
![m_{total} =m_{g} + m_{fluid} \\m_{total} = 498.6 + 13.78\\m_{total} = 512.38[kg]](https://tex.z-dn.net/?f=m_%7Btotal%7D%20%3Dm_%7Bg%7D%20%2B%20m_%7Bfluid%7D%20%5C%5Cm_%7Btotal%7D%20%3D%20498.6%20%2B%2013.78%5C%5Cm_%7Btotal%7D%20%3D%20512.38%5Bkg%5D)
The quality will be equal to:
No B. its false<span> they do not. Lyphnodes are a permant part of the body and you have them in your Neck</span>
Answer:
20 N
Explanation:
<em>Newton's second Law of motion</em> law states that If there is a external force acting on an object. Then the rate of change of momentum of that object is directly proportional to the force acting on its.
- the net force acting upon the object <em>(F)</em>
- the mass of the object. <em>(m)</em>
- <em>V </em>Final velocity of the object
- U initial velocity of the object
- mV -Final momentum of the object
- mU - Initial momentum of the object
Due to momentum change of that object, momentum change. We can write the equation bellow this,
F = (mV-mU)/t
When m is constant we can write the above expression like this,
F = m (V-U)/t
There for
(V-U)/t = a ( Rate of change of velocity can be denoted as acceleration )
F = m× a
we can state this in mathematically,
a = F/m
in another representation
F = m*a
Net Force = mass*acceleration
= 10 * 2
= 20 N
object is subjected to a negative acceleration due to the friction.
<span>Prior to the Cambrian, organisms with hard parts (eg. shells and bones) weren't present for most the time, and it's generally such hard parts that get to fossilize. There's also been more time for Precambrian deposits to get destroyed by natural processes, </span>
<span>The supply of Precambrian fossils has actually greatly improved over the last few decades. The so called Ediacaran faunas have been found at many parts of the world, and would be worth looking into.hope it helps</span>
<span>i believe the answer is
D. Wool is an excellent thermal insulator because heat flows through it very slowly.</span>
