The mass law is LAW OF CONSERVATION OF MASS.
The law of conservation of mass states that mass, in an isolated system is neither created nor destroy by chemical reaction or physical transformations.
This implies that, the mass of the chemicals before the reaction will be equal to the mass of the product after the reaction.
JJ Thomson discovered electrons using the cathode ray. Electrons are negatively charged particles that orbit around the nucleus of an atom. Finding out that there was a negative charge to balance out the positive charge. This later helped develop Hund's Rule and the Pauli Exclusion Principle.
If the cyclist rode at an average speed of 10mph for 15 miles...
we can solve by dividing the distance by the speed to get time using the equation...
Δspeed = Δdistance / Δtime
Δtime = Δdistance / Δspeed
Δtime = 15 miles / 10 mph = 1.5 hours
