The correct answer is answer choice B.
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Answer:
Explanation:
From the first law of thermodynamics
Q=ΔU+W
Q=heat supplies to the system
ΔU=change in internal energy of the system
W= work done by the gas by the system
Q =12 KJ
ΔU==(mR/k-1)ΔT
ΔU=*(460-400)
=14.924 KJ
Q=ΔU+W
W=-2.924 KJ
=+
=work done by the air
= P(V2-V1)
=mRT2-mRT1
=mR(T2-T1)=0.138*0.287*(460-300)=
=6.33 KJ
=+
=-2.924-6.33
=-9.26 KJ
Answer:
Explanation:
Work is equal to the product of force and distance.
We are solving for the distance, d. We know the force is 596.82 Newtons and the work is 35,674.7 Joules.
- If we convert the units for Joules, the problem will be simpler later.
- 1 Joule is equal to 1 Newton meter.
- The work done by the runner, 35,674.7 J, equals 35,674.7 N*m
Substitute the values into the formula.
We want to solve for the distance, so we must isolate d on one side of the equation.
d is being multiplied by 596.82 Newtons. The inverse of multiplication is division. Divide both sides of the equation by 596.82 N
The Newtons will cancel, hence the prior unit conversion.
Let's round to the nearest hundredth, so the answer is concise. The 4 in the thousandth place tells us to leave the 7 in the hundredth place.
The distance covered during the portion of the race is about <u>59.77 meters.</u>