# Uncertainties in physics project help???!Watch

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#1
So I'm doing my physics project and at one point I have to change from g to N. The scale reading uncertainty in the balance is 0.01 g but would this be the same in the force ?
Same with converting from mm to m?

For the second procedure, I'm doing e/m ratio so one of the equations used is Velocity of electron =E/B
Where B= the Helmholtz coil equation
So would the uncertainty in B be the same as the uncertainty in current as that's the only thing I varied?
0
#2
Someone help plz
0
3 years ago
#3
More often than not assumptions are made that constants have no uncertainty, at the least that's how we've had to do it, so assigning g an uncertainty of 0 (mass * g/gravi-field-strength @ the point, but yah just 9.81 most often) means that the uncertainty in the weight = uncertainty in the mass :_;

Of course you can work other uncertainties out but have fun with that. On the other thing, I have positively no idea. If you're using a constant, I'd think it safe to assume that the constant has no uncertainty, and just work from there.
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