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 (estrus) is simply the period of time when a cow or heifer is sexually receptive and signals that an egg, ready to be fertilized, is about to be released. It normally occurs every 18 to 24 days. In a natural breeding program, the bull is the one that determines when a cow is in heat.