Use of sunglasses ?️ in earlier days. #Shorts

Why sunglasses have zero power ?

Why was science called natural philosophy in earlier days?

A man ate 100 grapes in 5 days. Each day, he ate 6 more grapes than those he ate on the earlier day. How many grapes did he eat on the first day?

Certain sunglasses use a polarizing material to reduce the intensity of light reflected from shiny surfaces, such as water or the hood of a car. What orientation of polarization should the material have in order to be most effective?

A team of 30 men is supposed to do a work in 38 days. After 25 days, 5 more men were employed and the work finished one day earlier.How many days would it have been delayed if 5 more men were not employed?