A jet pilot pulls his plane out of a dive in a constant speed. If his heart is 0.5 m below his
brain .What is the blood pressure in the brain?
(Assume blood pressure at heart is 6.3 KPa;
and the density of blood is 1060kg/m³)?

You can find results and justify them? you can test your hypothesis

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.

We can infer that star y is closer but other factors must be considered including the heat of the star, the mass, and the brightness of the star. even though star x seems dimmer it may just be less bright or contain less heat.