What is heat ? State its S.I. unit

How is the electric potential difference between two points defined ? State its S.I. unit.

What is kWh ? State its value in S.I. unit.

What is meant by pressure ? State its S.I. unit.

Define the term thrust. State its S.I. unit.

What do you mean by the term frequency of a wave ? State its S.I. unit.

Define heat capacity and state its SI unit.

Define heat with its S.I Unit

Define velocity. State its S.I. unit.

Define acceleration. State its S.I. unit.

Define the term weight and state its S.I. unit.