To complete the marathon of 26 miles in 4.5 hours, the average speed required is 9.3 kilometers per hour.
To find the average speed required to complete a marathon of 26 miles in 4.5 hours, we can use the formula:
average speed = total distance / total time
The total distance of the marathon is 26 miles, which is equivalent to 41.84 kilometers (1 mile is approximately 1.60934 kilometers).
The total time we want to complete the marathon in is 4.5 hours, which is equivalent to 4.5 × 60 = 270 minutes.
Converting the units of distance and time to kilometers and minutes respectively, we have:
average speed = 41.84 km / 270 min
Simplifying this expression, we get:
average speed = 0.155 km/min
To convert the units to kilometers per hour, we can multiply by 60, since there are 60 minutes in an hour:
average speed = 0.155 km/min × 60 min/h = 9.3 km/h
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Answer:
True........................
Yes, it has a speed and a direction, and that makes a velocity. So it's True.
Answer:
0.8684 atm
Explanation:
Using combined gas equation,
PV / T = k
P1*V1 / T1 = P2*V2 / T2
P1 = 1.10 atm
P2 = ?
V1 = 2.5L
V2 = 3.9L
T1 = 298k
T2 = 367k
P1*V1 / T1 = P2*V2 / T2
Making P2 the subject of formula;
P2 = P1*V1*T2 / V2*T1
P2 = 1.1*2.5*367 / 3.9*298
P2 = 1009.25 / 1162.2
P2 = 0.8684 atm
Here you go
This problem can be solved using one of the different gas laws, which is shown below:
PV/T
Given:
P1 = 1.1 atm
V1 = 2.5 L
T1 = 298 K
P2 = ?
V2 = 3.9 L
T2 = 367 K
Substituting the given:
P1V1/T1 = P2V2/T2
(1.1 * 2.5)/298 = (P2 * 3.9)/367
P2 = 0.868 atm
Hope it helps
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