Look at the Sankey diagram for a petrol engine below. What is the efficiency of the engine if it was used to heat the interior of a vehicle?

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

d. air pressure decreases as altitude increases.

answerscientific theory;

= initial pressure

= final pressure = 2

= initial volume

= final volume = /4

= initial temperature = 20 c = 20 + 273 = 293 k

= final temperature = ?

using the equation