Jatinder Singh Solutions for Chapter: Physical Quantities and Measurement, Exercise 1: EXERCISES

When does a body sink in a liquid?

Choose the odd one out giving the reason.

Choose the odd one out by giving a reason.

Choose the odd one out by giving a reason.

Choose the odd one out by giving a reason.

A body experiences an upward force called:

(Choose from the following: Gravitational force/ Upthrust)

Rocks are sometimes used along coasts to prevent erosion. If a rock needs to weigh $2000 \mathrm{kg}$ In order not to be shifted by waves, how big (what volume) does it need to be? You are using basalt, which has a typical density of $3200 \mathrm{kg} {\mathrm{m}}^{-3}$.

A golden-coloured cube is handed to you. The person wants you to buy it for '$1 \mathrm{lac}$, saying that is a gold nugget. You pull out your Chemistry textbook and look up gold in the mineral table and read that its density is $19.3 \mathrm{g} {\mathrm{cm}}^{-3}$. You measure the cube and find that it is $2 \mathrm{cm}$ on each side and weighs $40 \mathrm{g}$. What is Its density? Is it gold? Should you buy it?