marja kaminai tj sy anser puch ra ha hoo mai
Linear momentum.
Energy, if collision is rigid, total momentum is a constant also.
What changes and what remains the same during a physical change
Linear momentum is mass times velocity. For a single point object, momentum is conserved, because the object will continue to move at a constant velocity. Nor will its mass change either. For a group of objects, too: When momentum is transferred, for example during a collision, any momentum lost by one object is gained by another. The total momentum remains constant.
In this context "conserved" means the total kinetic energy of all the objects is the same after the collision as before the collision. Note, the TOTAL is the same but the individual kinetic energies of each object may be different before and after. When two or more objects are about to collide they have a certain total kinetic energy. It is common that during the collision some of the kinetic energy is transformed into heat. So after the collision the total kinetic energy is less then before the collision. This is a non-elastic collision. There are some collisions, however, in which none of the kinetic energy is changed to heat. These are called ELASTIC collisions. So the total kinetic energy doesn't change, or is "conserved". There is another possible non-elastic collision. If during the collision there is an explosion, then its possible for the objects to have a larger total kinetic energy after the collision as they aquire some of the explosive energy. Finally note, that in all collisions the TOTAL vector momentum is the same just before and just after the collision. So in a collision momentum is always conserved.
marja kaminai tj sy anser puch ra ha hoo mai
Mass is conserved. This means it remains constant.
well i know momentum remains same before and after collision... But what about the period during which collision takes place?
The number of neutrons is not conserved during decay.
During a chemical change,chemical energy may be changed to other forms of energy.other forms of energy may also be changed to a chemical energy.
Its conserved during the combustion of anything - the mass of the products is always equal to the mass of the materials that react.
Linear momentum.
It Doesn't
Both mass and charge
Conserved.
Atomic mass is conserved. Atomic number is NOT typically conserved in nuclear reactions. For example, when U235 spits out an alpha particle, its number drops by two (loss of two protons), and the mass by four, resulting in Thorium 231. The total mass is conserved, because the mass of the emitted alpha particle is 4.When an element decays by beta particle emission, the atomic number goes up by one, but the mass remains essentially the same. In spontaneous fission a pair of atoms reform with a spray of free neutrons. These neutrons have a half life of almost 15 minutes. If they bombard sufficiently heavy neighboring nuclei, what occurs is known as a fission chain reaction.
Mass (Matter) and Energy is conserved during a Chemical equation