A 500-W electric space heater with a small fan inside heats air by blowing it over a hot electrical wire. For each control volume—(a) wire only, (b) all the room air, and (c) total room air plus the ...Read more
Sumit KumarPundit
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CV A is the mass inside a piston/ cylinder, and CV B is the mass plus the piston outside, which is the standard atmosphere. Write the energy equation and work term for the two CVs, assuming we ...Read more
If a process in a control mass increases energy E2 − E1 > 0, can you say anything about the sign for 1Q2 and 1W2?
Why do we write E or E2 − E1, whereas we write 1Q2 and 1W2?
A car engine is rated at 110 kW. What is the power in hp?
What is 1 cal in SI units and what is the name given to 1 N-m?
A car of mass 1100 kg drives with a velocity such that it has a kinetic energy of 400 kJ (see Fig. 3.6). Find the velocity. If the car is raised with a crane, how high should it ...Read more
Heat flow into a system is ____, and heat flow out of the system is ________
In an open system, for maximum work, the process must be entirely
If in the equation pv^n=C, the value of n=∞, then the process is called,