science question!! helpp?

Question

explain static and dynamic balancing

and

explain conservation of mass. refer to vinegar and baking soda experiment.



thankss!! :)

Answer 1

Static balancing refers to balancing something which is standing still, such as a bridge. All the forces trying to pull it one way must be balanced by equal forces pulling it the other way - both vertically and horizontally. Dynamic balancing refers to balancing something which is moving - either in a line or rotating. Tires & wheels on a vehicle must be balanced to rotate smoothly. The forces from the engine pushing the car forward (at a constant speed) are balanced by friction forces pushing backward (with the air, the road, and within the car itself such as the drive train and wheel bearings).

In any chemical experiment, the mass of the reactants (vinegar or acetic acid and baking soda or sodium bicarbonate) must equal the mass of the products (sodium acetate, water, and carbon dioxide). The number of atoms of each element on the left of the equation must equal the number of atoms of each element on the right of the equation.