A digital bathroom scale is a type of electronic weighing machine, which is used to measure many readings including body fat, BMI, lean mass, muscle mass, water ratio along with body weight.
Physics is related to chemistry, in a way that physics is also concerned about how atoms and molecules react, or in other words, move, when subjected to pressure and another chemical. The fizzing, bubbling, and smoking of substances, we can apply the laws of physics to these. Physics can be associated practically with everything.
Physics is the study of the basic elements of nature dealing with the key components that govern it, energy, matter and the their interaction in time and space. As such physics provides an important anchor to the to study all higher order scientific studies such us Biology and Chemistry. Without space, matter, energy and time the living organisms will not exist, and the ability to create a science that would study living things, Biology, would not exist either.