The engine power of the ocean liner is 29.4 MW, and their efficiency is 25%. How much oil will the liner consume in 5 days?

Initial data: N (power of the ocean liner engines) = 29.4 MW = 29.4 * 10 ^ 6 W; η (efficiency of ocean liner engines) = 25% = 0.25; t (duration of operation of the engines of the ocean liner) = 5 days.

Reference data: q (specific heat of combustion of oil) = 44 * 10 ^ 6 J / kg.

SI system: t = 5 days. = 5 * 24 * 3600 s = 432000 s.

We determine the mass of oil from the formula: η = N * t / (q * m), whence m = N * t / (q * η).

Calculation: m = 29.4 * 10 ^ 6 * 432000 / (44 * 10 ^ 6 * 0.25) = 1,154,618 kg ≈ 1,155 tons.