A furnace uses preheated air to improve its fuel efficiency. Determine the adiabatic flame temperature when the furnance is oper
ating at a mass air-fuel ratio of 16 for air preheated to 600 K. The fuel enters at 300 K. Assume the following simplified thermodynamic properties: Tref = 300 K MWFUEL=MWAIR=MWPROD = 29 kg/kmol cp,fuel =cp,air= cp,prod = 1200 J / kg-K
hf,air = hf,prod = 0 hf,fuel = 4x107 J/kg
Answer: With crumple zones at the front and back of most cars, they absorb much of the energy (and force) in a crash by folding in on itself much like an accordion. ... As Newton's second law explains force = Mass x Acceleration this delay reduces the force that drivers and passengers feel in a crash.Sep 30, 2020
