You hear a Concert A tone from the speaker. Describe the motion of the speaker and how this motion leads to our ears detecting the Concert A tone, that is include the chain of cause-and-effect logic that results in your hearing Concert A tone from the speaker.

How to tell if a molecule is polar or nonpolar with electronegativity

Explain why electric current cannot exist if a current doesn't have a voltage source.

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.