Determine the number of light years in one metre.

5.74 g of a substance occupies 1.2 cm³. Express its density to correct significant figures.

If displacement of a body s = (200 ± 5) m and time taken by it t = (20 + 0.2) s, then find the percentage error in the calculation of velocity.

If the error in measurement of mass of a body be 3% and in the measurement of velocity be 2%. What will be maximum possible error in calculation of kinetic energy.

A physical quantity P is related to four observables a, b, c and d as follows:
P = \(\frac { { a }^{ 3 }b^{ 2 } }{ d\sqrt { c } } \)
The percentage errors of measurement in a, b, c and d are 1%, 3%, 4% and 2% respectively. What is the percentage error in the quantity P?