Answer:
Hope it helps...
Explanation:
-the main advantages and benefits you'll get from using a computer.
Increase your productivity. ...
Connects you to the Internet. ...
Can store vast amounts of information and reduce waste. ...
Helps sort, organize, and search through information. ...
Get a better understanding of data. ...
Keeps you connected.
the disadvantages to using a computer and what type of problems you may personally encounter.
Carpal tunnel and eye strain. ...
Too much sitting. ...
Short attention span and too much multitasking. ...
Can limit learning and create a dependency. ...
Potential of loss of privacy. ...
Time sink and lots of distractions.
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Answer:
maximum allowable electrical power=4.51W/m
critical radius of the insulation=13mm
Explanation:
Hello!
To solve this heat transfer problem we must initially draw the wire and interpret the whole problem (see attached image)
Subsequently, consider the heat transfer equation from the internal part of the tube to the external air, taking into account the resistance by convection, and conduction as shown in the attached image
to find the critical insulation radius we must divide the conductivity of the material by the external convective coefficient
Answer:
Δ enthalpy = -23 Btu/Ibm
Explanation:
Given data:
Pressure ( P1 ) = 250 psi
Initial Temperature ( T1 ) = 175°F
Final temperature ( T2 ) = 20°F
<u>Calculate the change in the enthalpy of R-134a </u>
From R-134 table
h1 = 129.85 Btu/Ibm
s1 = 0.23281 Btu/Ibm.R
note : entropy is constant
hence ; s1 = s2
by interpolation ; h2 = 106.95
Δ enthalpy = h2 - h1
= ( 106.95 - 129.85 ) = -23 Btu/Ibm
