While taking a plane flight to a meeting, a physicist decides to do a mental calculation of how much fuel the plane would consume in the absence of friction, assuming its engines have an efficiency of 22.0% and the mass of the plane is 200,000 kg. Each gallon of jet fuel produces 1.30 multiplied by 108 J of heat when burned.

(a) How many gallons of fuel are used to get the plane from rest to the takeoff speed of 55.0 m/s?

(b) How many gallons to get to a cruising speed of 250 m/s and an altitude of 10.0 km?

(c) How much waste heat is produced in each case(in part a and b)? (Both the actual fuel consumption and heat produced will be greater because of air resistance.)

I know how to do the first one.
(0.5*200000*55^2)/[(1.30*10^8)*0.22]
=10.6 gal

And part of (c)
Q waste=1.3*10^8*10.6-0.5*200000*55^2=1.08*10^9 J

Similar Questions
    1. answers icon 0 answers
    1. answers icon 1 answer
  1. PLEASE HELP!The 24 hr flight took place in the middle of the summer,when days are longer. Do you think the 24 hr flight would
    1. answers icon 1 answer
  2. FLIGHT COMPANY-PILOT (Pilot No; Pilot-name;Addr; Salary); - FLIGHT (Flight-ID; Flight-name; H-Dep; D-Arr; Pilot-ID; Plane-ID;
    1. answers icon 1 answer
more similar questions