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.
Thanks tiny-tim.I like to think of perfectly elastic and perfectly inelastic collisions as being at two extremes and that most collisions with macroscopic objects lie somewhere between those extremes.Although macroscopic object cannot collide perfectly elastically they can collide perfectly inelastically,although such collisions may be rare.Just one example would be when, in the rest frame of the observer,a bullet with a certain momentum in one direction collided with and became embedded in ...