Determine how many hydrogen atoms a compound has if it is a hydrocarbon and it’s carbon atom skeleton is C=C-C=C.

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

Anybody wanna ? (picture included? )

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.