An inventor claims to have devised a cyclical power engine that operates with a fuel whose temperature is 750 °c and radiates waste heat to a sink at 0 °c. he also claims that this engine produces 3.3 kw while rejecting heat at a rate of 4.4 kw. is this claim valid?

Yes

Explanation:

Given Data

Temprature of source=750°c=1023k

Temprature of sink =0°c=273k

Work produced=3.3KW

Heat Rejected=4.4KW

Efficiency of heat engine(η)=

and

Heat Supplied

η=

η=42.85%

Also the maximum efficiency of a heat engine operating between two different Tempratures i.e. Source & Sink

η=1-

η=1-

η=73.31%

Therefore our Engine Efficiency is less than the maximum efficiency hence the given claim is valid.

explanation:

i don't understand really? can u provide more information

u should make a machine that can make ice cream fresh!

the warning light flashes for a second or two when the engine starts. if it stays on, there's must be something wrong with the coolant. you should never dare to continue driving when the light is on. pull over as soon as possible and shut the engine off.

hope this is what you're talking about