Physics is a science meteorologists use to measure a tornado.
Explanation:
When you are going to write a sentence, the verb and the subject of the sentence have to be in agreement with one another. That is, if the subject is in the plural, the verb must be in the plural also; if the subject is in the sungular, the verb must also be in the singular.
In this case, the word "physical" that is the subject of prayer is in the plural, so the right is to use the word "is" which is the verb "to be" in the singular.
