The word "physical" refers to anything related to the body or the material world. In this context, it is being used to describe a specific use or application of something in the physical world.
The best way to determine if your use of the word "physical" is correct is to consult a dictionary or grammar guide. It is also helpful to consider the context and intended meaning of the word in your sentence.
Yes, "physical" can be used in multiple ways in a sentence. It can be used as an adjective to describe something in the material world, or as a noun to refer to a physical activity or examination.
Yes, "physical" is a commonly used word in scientific language. It is often used to describe the physical properties and behaviors of objects and substances in the natural world.
Yes, there are alternative words that can be used instead of "physical" depending on the specific context and meaning. Some examples include tangible, material, corporeal, and bodily.