physics

posted by .

The engine of a large ship does 2.05 multiplied by 108 J of work with an efficiency of 4.00%.

(a) How much waste heat (J) is produced?

(b) How many barrels of fuel are consumed, if each barrel produces 6.00 multiplied by 109 J of heat when burned?

  • physics -

    What are the dimensions of the 2.05? Meters displacement?

  • physics -

    W=2.05•10⁸ J
    η= 4.00%=> η = 0,04
    Q =W/0.04=5.125•10⁹ J
    Waste heat = Q - W = 5.125•10⁹-2.05•10⁸ = 4.92•10⁹ J
    N= 5.125•10⁹/6•10⁹ = 0.85

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics.

    Heat engine X takes four times more energy by heat from the hot reservoir than heat engine Y. Engine X delivers two times more work, and it reject seven times more energy by heat to the cold reservoir than heat engine Y. Find the efficiency …
  2. Physics

    Consider an inefficient engine which draws 200 J of heat from a hot reservoir at 100oC, converts 48 J to work, and rejects 152 J to a cold reservoir at 0oC. Theoretically, how much maximum work can be produced if the efficiency of …
  3. Physics

    Consider an inefficient engine which draws 200 J of heat from a hot reservoir at 100oC, converts 48 J to work, and rejects 152 J to a cold reservoir at 0oC. Theoretically, how much maximum work can be produced if the efficiency of …
  4. Physics

    Consider an inefficient engine which draws 200 J of heat from a hot reservoir at 100oC, converts 48 J to work, and rejects 152 J to a cold reservoir at 0oC. Theoretically, how much maximum work can be produced if the efficiency of …
  5. Physics

    Consider an inefficient engine which draws 200 J of heat from a hot reservoir at 100oC, converts 48 J to work, and rejects 152 J to a cold reservoir at 0oC. Theoretically, how much maximum work can be produced if the efficiency of …
  6. physics

    (a) How much waste heat is produced by an electrical power station that uses 1.05 multiplied by 1014 J of heat input with an efficiency of 40.0%?
  7. physics

    A 500 kg dragster reaches a speed of 100 m/s on level ground, starting from rest. Its efficiency is only 8.00% in producing kinetic energy, because of friction and its design for high power without regard to efficiency. (a) How many …
  8. physics

    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 …
  9. physics

    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 …
  10. physics

    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 …

More Similar Questions