In the latter case the resistance is caused by dissipation of mechanical energy when the configuration or the direction of flow is sharply changed, by the formation of vortices and secondary flows as a result of the flow breaking away, by the centrifugal forces, etc.
Why do animals depend on plants. Plants give animals the food and shelter they need. Herbivores, which are plant eating animals, rely on plants to provide them with a regular source of food. They also provide shelter to may animals, both large and small.
Competition of the Herbivorous Kind. Competition isnât just a phenomenon in the animal world; plants compete with each other too. They need adequate sunlight, soil nutrients, and fresh water to survive. Though they are stationary, they still have ways of combating each other.ompetition happens when two parties want the same thing, but there isnât enough of it to go aroundâ¦so they compete for it.