4 years ago

What does it mean to say the mass is conserved during a physical change ?

2 answers:

5 0

The total mass of the substance remains the same from beginning to end. The physical properties of the substance, such as size and shape, may change. The amount of matter in the substance does not change.

Olin [163]4 years ago

4 0

Mater doesn't just appear or disappeared. Chemical elements are still there just the connections and how it combines changes.

So what goes into your chemical eqation must still exist after the change.

You might be interested in

What percentage of the power of the battery is dissipated across the internal resistance and hence is not available to the bulb?

spin [16.1K]

Lets us consider an example:

Suppose a 10 ohm bulb is connected across the terminals of a 10 V

battery having 2ohm internal resistance.

Then total reistance in series we know, R1 + R2

Thus, R net = 10+ 2 = 12 ohm

The, current across circuit = 10/12= 0.833 A

Now, Power is given by $P = i^{2} R \\ \\$