A body floats in liquid but stays completely immersed in it when :

Archimedes was assigned a task by a king to check whether his crown was made up of pure gold or an alloy of gold Archimedes constantly thought about this problem. One day when he entered his bathtub, an idea clicked in his mind, which was the solution to the task assigned. He was so excited with his idea that he ran on street without putting on his clothes screaming ‘Eureka’ Eureka’ i.e. I found it.

$\left(i\right)$ What is buoyancy?

$\left(ii\right)$ What is Archimedes principle?

$\left(iii\right)$ What values were shown by Archimedes?

Divya’s mother Mrs. Sunita took milk from the milk vendor but she doubted the purity of milk. She started arguing with the milk vendor. The milk vendor assured that the milk is pure but could not convince her. Divya who was listening all this decided to check the purity of milk with the help of a lactometer. On checking she found that the milk was pure.
Read the passage and answer the following:
$\left(i\right)$ What is relative density? What is its unit?
$\left(ii\right)$ What does lactometer measure?
$\left(iii\right)$ What are the moral values displayed by the milk vendor?

Mamta went to purchase a school bag with her father with a budget of  $₹1000/-$. She almost finalised a stylish bag worth $₹1000/-$ with a thin strap. At the same time she saw another bag with wider strap worth $₹500/-$ but their looks were average. She recalled the topic learnt in physics on pressure. She understood that the bag with a wider strap was more comfortable. So, she purchased two bags of wider strap one for herself and one for her poor friend who was much in need of a school bag.
$\left(i\right)$ What is pressure?
$\left(ii\right)$ Why is wider strap bag more comfortable?
$\left(iii\right)$ What are the values shown by Mamta?