Question

give reason for the following (a) A new quilts is warmer than old one (b) a brass tumbler feel much cooler than a wooden tray on a chilly day (c) the bottom of cooking utensil are often kept black

Answer 1

a. They trap a layer of air between themselves and our body. Such trapping of air is much better in a new quilt than old one . Our body heat , then does not easily escape out through this trapped air layer and we stay warm
b.