Performing the Chemical Test by Reagent Strip The urine must be collected using appropriate technique and be tested within one hour ofcollection. If tests cannot be performed within this time, the specimen may be refrigerated for upto 8 hours.
Elastic and Inelastic Collisions. A perfectly elastic collision is defined as one in which there is no loss of kinetic energy in the collision. An inelastic collision is one in which part of the kinetic energy is changed to some other form of energy in the collision. Any macroscopic collision between objects will convert some of the kinetic energy into internal energy and other forms of energy, so no large scale impacts are perfectly elastic.
If we stretch the quartz fiber or phosphor bronze beyond the elastic limit, a small permanent set occurs. Quartz fiber and phosphor bronze are nearest approach to the perfect elastic body. A body is said to be perfectly elastic if it completely regains its original form when the deforming force acting on it is removed. Since no material can regain completely its original form, the concept of perfect elasticity is an ideal concept. Cheers!!