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23 Nov 2019

The use of the British thermal unit (Btu) is common in muchengineering work. A Btu is the amount of heat required to raise thetemperature of 1 lb of water by 1 degree Farenheit.

Calculate the number of jouled in a Btu.

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Trinidad Tremblay
Trinidad TremblayLv2
4 Aug 2019

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Related questions

Specific heat is defined as the energy required to raise the temperature of a unit mass of a substance by one degree. Pure aluminum has a specific heat of approximately 900J/(kg*celcius). Convert this to Btu/(lb*farenheit).

Need to see how the dimensional anylasis is preformed, not just the final answer.

a space has a sensible cooling load of 200,000 btu/h and latent cooling load 70,000 btu/h. the space is mantained at 74F DB and 50% RH. ventilation is required at a rate of 2000CFM. outside conditions are that of Cincinnati, OH. supply air is 60F DB.

a) sketch the equipment, showing known information

b) determine the room CFM

c) determine the supply air WB

d) determine the DB and WB of the air entering the AC unit

e) determine total coil load due to ventilation in Btu/lb

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When a gallon of gasoline if burned in air, it releases about140,000 BTU of heat. If 40% of the heat can be converted tomechanical work by the engine, what is the minimum about ofgasoline required to accelerate the truck from 0 to 60mph if theweight if 40 tons?

BTU is in ft*lb so:
First I converted miles to feet:(60miles/hour)*(5280feet/mile)=316,800feet/hour
Then, tons to pounds: (40 tons)(2000lb/ton)=80,000 lbs

Then I need to use Q=deltaKE to get to the answer so:
Q=.5m(v-v0)^2
Q=.5(80,000lbs)(316,800-0)^2
Q=4.014*10^15 ft*lb/hour

I can't figure out how to get rid of the time aspect to get theanswer just in BTU so I can eventually convert it to gallons using:140,000*.40= 56,000 BTU/Gal

HELP! Our book doesn't use calculus, so simple answers please. AndI know the answer I'm trying to get to is .221 gallons.

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