If it takes 5.0 hrs to drain a container of 540.0m\(^3\) of water, what is the flow rate of water from the container in kgs\(^{-1}\)? [Density of water = 1000kgm\(^{-3}\)]
32.5kg-1 s
31.5kg-1
30.8kg-1 s
30.0kg-1 s
Explanation
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Discussions (16)
The error there is their unit. They said "rate", anything that has to do with rate is always per seconds, but in the question they wrote per kilograms and even did the same thing in the options which would then get you confused 😒.
The explanation is correct, rate = mass/time and mass = density* volume.
The questions says cm³ but in the answer what we saw was m³ Also the unit is wrong
okay now I understand, I just postulated my own formula that I use to self this shii
you dont just stick to one formula you should also know that physics is a combination of maths.
v=540cm3
t=5hours=5×60×60
density(p)=1000
converting cm3 to m3=540/100=5.4m3
1000×5.4/5×3600=0.3kg/s
we also know that rate is percentage(%) from your maths
0.3 ×100=30.0kg/s
