Is it possible to ascertain the "true" nature of reality since the question of the types of substance involves that which is metaphysical?
No, but it is possible to develop a form of obsessive-compulsive disorder that involves that sort of thing.
Faith in a metaphysical sense is the belief in something greater than oneself, such as a higher power, universal energy, or divine source. It involves trust, surrender, and a connection to the unknown and unseen aspects of life. Having faith can provide guidance, strength, and a sense of purpose in navigating life's uncertainties.
you cannot PNP-NPN looks the same but with a meter it is possible to check diode continuity therefore ascertain the type
Is it possible that your teacher is mrs MJ?
Yes, it is possible if one of the substance will sublime and others will not.
Radioactive waste is nearly always a mixture but it is possible to be a pure substance.
Yes!
saturated solution
This is a saturated solution.
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There is no widely known or documented individual named Ishmael Ewing. It is possible that there may be someone with that name, but without more context or specifics, it is difficult to ascertain their existence.
The answer depends on what substance is in the balloon and the substance which forms the exterior environment. Since there is no information on either, it is not possible to answer the question.