Why it is much hotter above a fire than by its side?

2

(a)

How does tea in a thermo flask remain hot for a long time?

2

(a)

Two bodies of specific heats C₁ and C₂ having same heat capacities are combined to form a composite body. what is the specific heat of composite body?

2

(a)

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

2

(a)

Two identical rectangular strip-one of copper and the other of steel are riveted to form a bimetallic strip. What will happen on heating?

2

(a)