1 Copper and PVC water pipes are relatively non-toxic. 2  Copper is a natural material that has been proven to be safe to health. 3  PVC pipes are also safe. 4  Lead on the other hand is extremely toxic. 5  Lead is corrosive and can leak into the drinking water system. PVC is likewise a safe material to carry drinking water. 2  Copper and PVC water pipes do not suffer easily from corrosion, while iron corrodes relatively easily. 3  Copper is relatively easy to work with because it is much softer than iron or lead.
Advanced. Stoichiometry determines the quantitative relationships between reactants and products. Stoichiometric relationships are based on the laws of conservation of mass and energy and the law of combining weights or volumes.
Chain of custody is important to the court because if I find something wrong with the evidence during the authentication process, it allows me to go back and determine who was responsible for the evidence up until that point. Importance to the investigation. The chain of custody is important to the investigation process because it is the first step when authenticating digital audio and video evidence. Identifying this chain of custody provides information about whether or not this evidence has been copied or cloned.