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.
Ionic solids are brittle and crack when stress is applied .This is because there are inter-ionic forces of attraction b/w the ion of the solids..When stress is applied the sim â¦ ilarly charged ions come in interaction to each other and forces of repulsion are developed b/w the ions and the solid is thus cracked.....onic solids are brittle and crack when stress is applied .This is because there are inter-ionic forces of attraction b/w the ion of the solids..When stress is applied the sim â¦ ilarly charged ions come in interaction to each other and forces of repulsion are developed b/w the ions and the solid is thus cracked.....