Is the study of the muscle movements in the human body an example of biology or of physics

Why should seat belts not be mandatory quick plz

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.