four forces act concurrently on a block on a horizontal surface as shown in the diagram below as a result of these forces the block

  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

3. dark matter

empty space could also be a simple vacuum

answerdmitry mendeleyev made a workable classification of the elements