A spark ignition engine of four-cylinder four-stroke cycle of a bore=88mm and a stroke of 84mm produce a torque of 160
N. m at 2200 rpm. The specific fuel consumption is 0.370
kg/kW. hr , the air fuel ratio is 18.5:1 and the LCV= 44500
kJ/kg. Determine:-
1-the brake power
2-the brake thermal efficiency
3-the volumetric efficiency if Pa= 1.0132 bar and Ta=310 K
4-the mean piston speed​

Why are graphs useful when interpreting data

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e