Answer:
a) 2.22 %
b) Range would be 60±1.998 km/h
Explanation:
Percentage uncertainty indicates the error of a reading. With the percentage uncertainty error for a measurement can be calculated.
a) Percentage uncertainty would be
Percent uncertainty is 2.22%
b) For 60 km/h error would be
Range would be 60±1.998 km/h
Answer:
number of coulombs = 1.28 ×
option b is correct
Explanation:
Given data
area A = 4cm
rate of hole r = 1000 cm/s
length L = 2mm
to find out
number of coulombs
solution
we will apply here number of coulombs formula that is
number of coulombs = e×A×L× r
put here value e = 1.6 × coulombs
and A = 4 × mand length = 2 ×
m
number of coulombs = 1.6 × × 4 ×
× 2 ×
× 1000
number of coulombs = 1.28 ×
so option b is correct