Two cars are moving with velocities 70km/hr and 50km/hr in east and west direction respectively . Find their relative velocity.

the part of the wave he is travelling on is the crest

  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