Question

3)Define the terms.
a) Dimensions
b)Absolute error
c)Dimensional formula
d)Relative error​

Answer 1

Explanation:

a measurable extent of a particular kind, such as length, breadth, depth, or height.

Absolute Error is the amount of error in your measurements. It is the difference between the measured value and “true” value. For example, if a scale states 90 pounds but you know your true weight is 89 pounds, then the scale has an absolute error of 90 lbs – 89 lbs = 1 lb

Force (F) [F] = [M L T-2]

Power (P) [P] = [M L2 T-3]

Velocity (v) [v] = [M L T-1]

Density (D) [D] = [M L3 T0]

Relative error (RE)—when used as a measure of precision—is the ratio of the absolute error of a measurement to the measurement being taken. In other words, this type of error is relative to the size of the item being measured. RE is expressed as a percentage and has no units.