The first engines developed were ____________________ combustion engines
Fill in the blank(s) with the appropriate word(s).
ANS: external
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?The number of oxygen atoms required to completely combust the fuel gas ____.
A. ?is two B. ?is four C. ?varies, depending on its molecular makeup D. ?varies, depending on its temperature
Rooftop units should not be installed in close proximity to exhaust vents or industrial processes that create fumes because:
A) The heat from the rooftop unit might cause down drafts. B) The exhaust might stain the side of the unit. C) The exhaust can be pulled into the unit's outdoor air intake. D) The roof supports are weaker near the vents.
What is the commonly used scale to measure earthquake intensity and who is credited for devising the scale?
What will be an ideal response?
If the input and output of a system are described by: Xin(t) = sin(2t)Xout(t) = sin(2t + 1)What is the time displacement relationship between the input and output?
A. the output lags the input by 1/2 sec B. the output lags the input by 1 sec C. the output leads the input by 1 sec D. the output leads the input by 1/2 sec E. the output is in phase with the input