Which of the following takes place in the combustion chamber of a gas turbine engine?
A. Fuel oil is mixed with a proper portion of compressed air
B. Gaseous combustion products are cool to a desired temperature
C. Fuel oil is stored with sufficient pressure
D. a glow plug is used to add enough heat to the chamber for combustion to occur

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?