A heat engine receives 6000 J of heat from its combustion process and loses 4000 J through the exhaust and friction. What is its efficiency

The efficiency of the heat engine is 33.33%.

Explanation:

Given;

input energy of the heat engine, = 6000 J

energy lost by the heat engine, = 4000 J

output energy of the heat engine = 6000 J - 4000 J = 2000 J

The efficiency of the heat engine is given as;

Efficiency = output energy / input energy

Efficiency = 2000 / 6000

Efficiency = 0.3333

Efficiency (%) = 33.33%

Therefore, the efficiency of the heat engine is 33.33%.

no sign of dia of fuel cell

c) up is the direction the magnetic force is acting on the charge.