In one cycle a heat engine absorbs 450 j from a high-temperature reservoir and expels 290 j to a low-temperature reservoir. if the efficiency of this engine is 55% of the efficiency of a carnot engine, what is the ratio of the low temperature to the high temperature in the carnot engine?

So the ratio will be

Explanation:

We have given heat engine absorbs 450 joule from high temperature reservoir

So

As the heat engine expels 290 j

So work done W = 290 J

We know that efficiency

It is given that efficiency of the engine only 55 % of Carnot engine

So efficiency of Carnot engine

Efficiency of Carnot engine is

0.64

Explanation:

QH = 450 J

Qc = 290 J

efficiency, η = 55 %

Let Tc be the low temperature and TH be the high temperature.

According to the Carnot's theorem

So, the ratio is 0.64.

double the distance = divide strength by 4

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force