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.
1 A good has unitary elasticity when the price elasticity of demand exactly equals 1. 2  There are two extremes: 3  A good is considered perfectly elastic when the price elasticity of demand approaches infinity. 4  This implies that the demand for the product is unlimited at the market price-the demand curve is horizontal.n this case the price of a gallon of gas rises from $1 a gallon to $1.10, a 10% increase. The quantity demand falls very little-from 20 gallons to 19, a 5% decrease. The resulting elasticity calculation is 0.5 (% change in quantity demanded / % change in price = 5%/10%, in absolute terms).