The bottom of a cooking utensil is painted black. Give the reason.

Give reason:

What are the basic requirements of a cooking utensil in respect of specific heat, thermal conductivity and coefficient of expansion?

Why do we use cooking utensils made up of copper ?

Solids are not easily compressible. Give reason.

"Cooking utensils are provided with wooden handles". Why ?

While cooking, if the bottom of the vessel is getting blackened on the outside, it means that

The front compound wall of a house is decorated by wooden spheres of diameter 21 cm, placed on small supports as shown in Fig 13.32. Eight such spheres are used for this purpose, and are to be painted silver. Each support is a cylinder of radius 5cm and height 7cm and is painted black.Find the cost of paint required if silver paint cost 25 paisa per cm^2 and black paint cost 5 paisa per cm^2

A convex lens of focal length 10 cm is painted black at the middle portion as shown in figure. An object placed at a distance of 20 cm from the lens. Then

Find the volume of 900 g of cooking oil whose density is 0.9 "g/cm"^3 . Give the answer in litres.

(i) Give reason for using dark coloured clothes in winter and bottom of utensils used for cooking food being black. (ii) Draw a table to compare the Kelvin, Celsius and Fahrenheit scales of temperature (steam point, ice point, absolute zero).