Dhund is a 1973 Hindi movie produced and directed by B. R. Chopra. The film is based on Agatha Christie's play, The Unexpected Guest, and stars Sanjay Khan, his then flame Zeenat Aman, Danny Denzongpa, Deven Verma, Madan Puri, Navin Nischol and Ashok Kumar.
The heat equation is a parabolic partial differential equation that describes the distribution of heat (or variation in temperature) in a given region over time.
Heat is the flow of energy from a high temperature location to a low temperature location. This flow of energy is always associated with changes in the system and the surroundings. There can be changes in the temperature, changes in the state of matter and changes that result from the doing of work.