Through which gas in the table do sound waves travel at the slowest speed? Air (dry)/Ammonia/Methane/Nitrous oxide
Speed of sound (m/s) 346/ 415/ 450/ 263

A. Ammonia
B. Nitrous oxide
C. Air
D. Methane

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.

Aball horizontally thrown from a cliff at 8m/s

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.