Question

1)What is SI unit?
2)What is difference between weight and mass?​

Answer 1

The International System of Units (SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system. It is the only system of measurement with an official status in nearly every country in the world.

In scientific contexts, mass is the amount of "matter" in an object (though "matter" may be difficult to define), whereas weight is the force exerted on an object by gravity.

Answer 2

Answer:

1)SI unit is known as standard unit.

2)The gravitational interaction between objects that have mass.

And the force by which object interact with earth is weight.