If you punch a wall with the force of 30N, what force will you feel on your fist

it depends on if collision elastic or in elastic

if collision is elastic the the wall will also exert 30 N

d) physical means can be used to separate the components of air.

  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