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help!!!!!

can someone help me with uncertainities
i suck at them :frown:

for example this question

The following measurements were made on a cylinder:
mass = 5.09 ± 0.01 kg
diameter = 9.4 ± 0.1 cm.

Calculate the actual uncertainty in the pressure.

will be looking forward for help
many thanks :smile:
Incoming.
Reply 2
Avatar for Zacken
Zacken
22
Original post by sanjukp
can someone help me with uncertainities
i suck at them :frown:

for example this question

The following measurements were made on a cylinder:
mass = 5.09 ± 0.01 kg
diameter = 9.4 ± 0.1 cm.

Calculate the actual uncertainty in the pressure.

will be looking forward for help
many thanks :smile:


Think about what you're doing with the mass and diameter to find the pressure. Are you adding them? Multiplying them? Squaring them? Do you know what happens to the uncertainty when you mutliply two quantities or raise them to powers?
Reply 3
Avatar for sanjukp
sanjukp
OP
yes i knw that whn we multiply we add the percentage uncertainities
which is the uncertainity/true value x100
raise thm to powers idk :|
Reply 4
Avatar for Zacken
Zacken
22
Original post by sanjukp
yes i knw that whn we multiply we add the percentage uncertainities
which is the uncertainity/true value x100
raise thm to powers idk :|


To find the fractional uncertainty in v2v^2 it's 2Δvv2\frac{\Delta v}{v}.
Reply 5
Avatar for sanjukp
sanjukp
OP
ahaan
got it
thaaanks
Reply 6
Avatar for Zacken
Zacken
22
Original post by sanjukp
ahaan
got it
thaaanks


Cheers.

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