If steel is more dense than lake water, why can a boat float? The average density of the boat, including the steel and air, is less dense than 1.00 g/cm³. The average density of the boat, including the steel and air, is more dense than 1.00 g/cm³. Lake water is more dense than pure water. Steel has a special ability to float regardless of density.

Arise 8 run 1 this means go 8 up and 1 across, which is steepest

If the heat engine is a perfect carnot cycle engine, thenefficiency = (t2-t1)/t2   where t1=temperature of cold reservoir ( ° k) = 135            t2=temperature of hot reservoir ( ° k)   = 325thereforeefficiency = (t2-t1)/t2 = (325-135)/325 = 0.5846 = 58%  note: this is the theoretical maximum efficiency of a perfect heat engine.   real-life engines do not achieve this value.

At maximum height, kinetic energy is converted in potential energy  formula: at max height, ke = ½ * 0.27kg * (16m/s) ² = 34.56 j  so the remaining pe = (41.70 – 34.56)= 7.14 j = 0.27 kg * 9.8m/s² * h  = (9.8/7.14 * 0.27)so max height h = 5.08 or 5 m