Question

hey please, have exam tomorrow need this answe....plz help...​

Answer 1

energy in the universe is constant -true but energy is not always available as energy itself .... energy isn't enough. we need to increase  the entropy of the universe for the energy to do work .

the law of conservation states that the energy of universe is constant .

Answer 2

a.It is necessary to save the energy because...

1.Most of the energy resources are limited

2. Energy is basic requirements for economic development.

3 . Due to industrialisation,modernisation,urbanisation the consumption of energy in all forms has been steadily rising all over the world.

b.the first law of Thermodynamic (Conservation) state that energy of universe is constant.