a relationship occurs when two or more things interact with one another & a hard implement requires mechanical matter to kaput ->  a relationship exists between simple machines and energy  a relationship exists between simple machines and energy & a physicist studies energy -> a vitalist science matter and its affair to hard values a physicist studies energy and its relationship to simple machines  a physicist studies energy and its relationship to simple machines & a vitalist is a mean of pseudoscientist -> a physicist is the scientist who study the relationship between simple machines and energy