What are supersonic speeds?

speeds at 343 m/s exactly

speeds above 343 m/s

speeds below 343 m/s

speeds exactly at the speed of sound

The answer is: B.

speeds above 343 m/s.

:)

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  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is