BONUS: Do you think that use of a particular recreational drug should be outlawed or restricted if it is a teratogen? Should any restrictions apply only to illegal drugs? make sure to explain what are teratogens and give specific examples of teratogens.

Creep is small change in shape. 

Which characteristics are true for polyvinyl impression materials? Have unpleasant aroma Good tear resistance Highly inflexible when set Very large amount of  shrinkage on setting Elastic recovery is 97.8 %

How is generalization used to simplify the models of a system with many similar objects?

All materials are classified into three phases, solids, liquids or gas.

Interaction and entanglement of crystals gives gypsum its strength. Anything that affects the strength of gypsum materials also affects their hardness.

The principle ingredient of an irreversible hydrocolloid is:

How is complexity in Software Systems handled?

The thermal coefficient of expansion of a material is a measure of the change in length for every degree of temperature change. The dimensional change (expansion) on setting of dental plaster is higher compared to dental stone.

Which one of the following SDLC models works well for high-risk projects with complex requirements?