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.
Theoretically, the ratio of the Poissonâs ratios should be equal to the ratio of the tension moduli of elasticity. In the calculation of the modulus of elasticity, the board is assumed to be isotropic throughout its thickness. Therefore, the modulus of elasticity is strictly the apparent modulus of elasticity.