User:Harsh bhakta

Italic text'Bold text'differentiation when the value of a quantity changes, it takes some time. for example, when a bowl of water is placed on a hot plate , and suppose the temperature of water increases from 30°c to 75°c in 5 minutes. so, the average rate of increase in its temperature, in this time interval is 9°c/minutes.

Average rate of change in temperature =ΔT/Δt=75°C-30°C/5 minutes=9°C/minutes 9°C/min is the time rate of change in temperature.