1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Usimov [2.4K]
3 years ago
12

A industrial (large) pressure cooker operates at 275 kPa. Initially there is 10 kg of water at 20°C, the cooker is operated unt

il 1 kg of saturated vapor is remaining in the cooker with the remaining mass leaving as vapor. The cooker is not insulated and10 MJ of heat is lost to the surroundings. How much heat was transferred to the cooker (use information below)?
Physics
1 answer:
alex41 [277]3 years ago
7 0

Answer:

Q_{in} = 25349.92\,kJ

Explanation:

Let establish a control volume in the industrial pressure cooker, which is a transient state system. From the First Law of Thermodynamics, the heating process is modelled:

Q_{in} + m_{1}\cdot h_{1} - m_{2}\cdot h_{2} = (m_{1}-m_{2})\cdot u_{2} - m_{1}\cdot u_{1}

The heat transfered to the cooker is:

Q_{in} = m_{2}\cdot h_{2} - m_{1}\cdot h_{1} + (m_{1}-m_{2})\cdot u_{2}-m_{1}\cdot u_{1}

Properties at each state are described below:

State 1

u_{1} = 83.913\,\frac{kJ}{kg}

h_{1} = 83.915\,\frac{kJ}{kg}

State 2

u_{2} = 2540.1\,\frac{kJ}{kg}

h_{2} = 2720.9\,\frac{kJ}{kg}

The heat transfered to the cooker is:

Q_{in} = (9\,kg)\cdot (2720.9\,\frac{kJ}{kg} ) - (10\,kg)\cdot (83.915\,\frac{kJ}{kg} ) + (1\,kg) \cdot (2540.1\,\frac{kJ}{kg} )-(10\,kg)\cdot (83.913\,\frac{kJ}{kg} )

Q_{in} = 25349.92\,kJ

You might be interested in
a sound wave travels through the ground, with a wavelength of 79.3m and a period of 0.615 s. how fast is the wave travelling?
12345 [234]

Answer:

The speed of the wave is 128.94 m/s

Explanation:

Use the relationship between wavelength (lambda) and frequency (f)  that are in a mutually reciprocal relationship via the speed of propagation:

\lambda = vT\implies v = \frac{\lambda}{T}\\v = \frac{79.3m}{0.615s}=128.94\frac{m}{s}

The speed of the wave is 128.94 m/s

3 0
3 years ago
Air in a thundercloud expands as it rises. If its initial temperature is 300 K and no energy is lost by thermal con- duction on
Ymorist [56]

Answer:

T_{f}=227K

Explanation:

Given data

Initial temperature of air Ti=300 K

Vf (final volume of air)=2Vi (initial volume of air )

To find

Final temperature

Solution

Since no energy is lost by thermal conduction during the process we categorize  this process as an adiabatic one.Hence we apply;

T_{i}V_{i}^{Y-1}=T_{f}V_{f}^{Y-1}\\T_{f}=T_{i}(\frac{V_{i}}{V_{f}} )^{Y-1}\\

Where air is predominantly a diatomic gas Y=1.4m

Substitute the given values

So

T_{f}=300K(\frac{V_{i}}{2V_{i}} )^{1.4-1}\\T_{f}=227K

5 0
4 years ago
Can someone help me with this
Monica [59]

Answer:

yes

Explanation:

what do u need help with

6 0
3 years ago
1. if the mass of something increases, it is harder to get it to move. this means the force required to accelerate it _____.
jeyben [28]
1.A Increases 
2.True 
.............
7 0
3 years ago
Read 2 more answers
In which of these cases is NO work done on the football? A) You lift a football off the ground. B) You raise a football over you
inn [45]

I believe the answer is C.

8 0
3 years ago
Other questions:
  • Atoms with a low electronegativity, like lithium, have a weak attractive force
    14·2 answers
  • An airplane lands and starts down the runway at a southwest velocity of 55 m/s. What is the magnitude of constant acceleration t
    14·2 answers
  • What is atmospheric pressure?
    8·1 answer
  • Forcé vs mass graph slope
    14·1 answer
  • What is the SI unit of electric charge
    13·1 answer
  • What the use of physics in our life​
    9·1 answer
  • An object has a mass of 5.20g. The mass of the object in kg is​
    15·1 answer
  • State examples of a transverse wave. ​
    14·2 answers
  • An aluminum-alloy rod has a length of 10.0 cm at 20°C and a length of 10.015 cm at the boiling point of water (1000C). (a) What
    6·1 answer
  • Student Wavelength Frequency Darius increase increase Kathryn increase remain the same Anya decrease increase Franco remain the
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!