Convert the following to relative uncertainties a) 2.70 ± 0.05cmb) 12.02 ± 0.08cm

data which is expressed in form of following way

here in above expression

= true value

= uncertainty in the value

now the relative uncertainty is given as

now by above formula we can say

a) 2.70 ± 0.05cm

here

True value = 2.70

uncertainty = 0.05

Relative uncertainty = = 0.0185

b) 12.02 ± 0.08cm

here

True value = 12.02

uncertainty = 0.08

Relative uncertainty = = 0.00665

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s