A physics student was given a 400 pages book and a metre scale and asked to measure the thickness of the paper in the book. Explain how can he measure it.

Name the instrument which can measure accurately the following the thickness of a paper

Can we say that every variation is a proportion A book consists of 100 pages. How do the number of pages read and the number of pages left over in the book vary? What happened to the number of left over pages, when completed pages are gradually increasing? Are they vary inversely? Explain.

A student uses a metre scale, measuring upto 1 mm, to measure the length and breadth of a rectangular plate. He finds that length = 5.7 cm and breadth = 3.4 cm. What is the percentage error in the area of the plate ?

The whole length of a metre scale is divided into 500 equal parts then the smallest measurement that can be measured by using the scale is "_______" .

The thickness of a piece of paper is 0.0036 inch Suppose a certain book has an Avogadro's number of pages calculate the thickness of the book in light-years. (1 light-year equal to 5.88xx10^12 miles)