A small Aeroplane of mass 600kg has an electric motor powered by fuel cells. Fuel cells use hydrogen gas and provide an electric current. When the Aeroplane is working, the energy changes are chemical --> electrical --> kinetic
electrical --> chemical -->kinetic
electrical --> kinetic --> chemical
kinetic --> chemical --> electrical

a and c

c is 100% but i am confused in a

  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