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
lara [203]
2 years ago
14

Refrigerant-134a enters the expansion valve of a refrigeration system at 160 psia as a saturated liquid and leaves at 30 psia. D

etermine the temperature and internal energy change across the valve.
Physics
1 answer:
KatRina [158]2 years ago
3 0

Answer:

Temperature : 92.9 F

Internal Energy change: -2.53 Btu/lbm

Explanation:

As

mh1=mh2

h1=h2

In table A-11 through 13E

p2=120Psi, h1= 41.79 Btu/lbm,

u1=41.49

So T1=90.49 F

P2=20Psi

h2=h1= 41.79 Btu/lbm

T2= -2.43F

u2= 38.96 Btu/lbm

T2-T1 = 92.9 F

u2-u1 = -2.53 Btu/lbm

You might be interested in
Is it possible to have negative velocity but positive acceleration? If so, what would this mean?
dusya [7]

Observe that the object below moves in the negative direction with a changing velocity. An object which moves in the negative direction has a negative velocity. If the object is slowing down then its acceleration vector is directed in the opposite direction as its motion (in this case, a positive acceleration). The dot diagram shows that each consecutive dot is not the same distance apart (i.e., a changing velocity). The position-time graph shows that the slope is changing (meaning a changing velocity) and negative (meaning a negative velocity). The velocity-time graph shows a line with a positive (upward) slope (meaning that there is a positive acceleration); the line is located in the negative region of the graph (corresponding to a negative velocity). The acceleration-time graph shows a horizontal line in the positive region of the graph (meaning a positive acceleration).

I don't know how I can show you the figure

4 0
2 years ago
During the period that the moon’s phases are changing from new to full, the moon is _____. waxing exhibiting retrograde motion w
Sindrei [870]
The answer that best fits the blank is the term WAXING. The moon is waxing whenever it reaches to the period that its phases are transitioning from new to full. The answer is the first option. This is when it is more that half is illuminated. Hope this helps.
3 0
3 years ago
Read 2 more answers
Humans living in highly populated areas are more inclined to
Eduardwww [97]

Answer:

they're more inclined to be violent so A

4 0
3 years ago
Read 2 more answers
Todo sistema heterogêneo é bifásico
strojnjashka [21]
I don't understand the language.....
3 0
3 years ago
Which statement best describes the benefits that would make the investment worthwhile?
Nadya [2.5K]
<span>Fusion produces large amounts of energy, and the fuel is found on Earth.</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • HELP! SHOW STEPS PLEASE!
    9·1 answer
  • While running at a constant velocity, how should you throw a ball with respect to you so that you can catch it yourself?
    6·1 answer
  • Suppose that it takes 0.6 seconds for a mass on a spring to move from its highest position to its lowest position. What is the p
    12·1 answer
  • A child does 350J of work while pulling a box from the ground up to his tree house with a rope. The tree house is 5.2 m above th
    14·1 answer
  • A rifle fires a 2.01 10-2-kg pellet straight upward, because the pellet rests on a compressed spring that is released when the t
    10·1 answer
  • A mercury barometer reads 745.0 mm on the roof of a building and 760.0 mm on the ground. Assuming a constant value of 1.29 kg/m3
    8·2 answers
  • What are day and night are produced by?
    12·2 answers
  • Someone please help me with finding the resistance of these circuits! I've been asking for an hour now. I will give brainliest i
    14·1 answer
  • What is the formula of moment of force​
    15·1 answer
  • The two concepts or issues that you chose and explain how each either has contributed to or detracted from social change, specif
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!