During a process, 23.5 MJ of heat is added to a closed system. If the internal energy is increased by 42.5 MJ, how much work in Btu was done? Is the work done on or by the system?
What will be an ideal response?
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The recommended R-value to obtain a moderate comfort standard for a ceiling is _____.
a. R-19 b. R-11 c. R-38 d. R-26
Suppose vs(t) = u(t) for t>0. Determine i(t) in the circuit of Fig. 18.40 using Fourier transform.
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?How is heat extracted from a natural draft wood-fired boiler?
A. ?mostly by release directly into the room B. ?through stainless steel tubes at the upper sides and top of the combustion chamber C. ?by radiation from the refractory bricks D. ?through a heat exchanger positioned just beneath the combustion chamber
The IEEE 802.11x is the popular CSMA/CA protocol employed for wireless LANs and ad hoc networks. Briefly describe all the current 802.11 standards and explain clearly how each is distinct from the other.
What will be an ideal response?