c is physical ie not chemical reaction ...
mass cannot be created or destroyed. in chem reaction, mass before reaction = total mass after. that would incl any gas
water. find the mass of, say, 100cc. divde the mass by the volume.
water = 1000kg/cubic metre. a lot of water ...
The kinetic energy of a molecule or a sample is equal to the mass of the substance multiplied by the square of teh velocity. The mass of electron is equal to 9.10938356 × 10-31 kilograms. The kinetic energy given is 2.28 *10^-19 J.Hence the velocity is equal to 500,291.28 m/s
Answer:
The Total Momentum before and after collision remains the same.
Explanation:
Note that the balls have the same masses.
A moving cue ball has an initial momentum. After every collision with another stationary ball, the momentum, which is the product of their mass and velocity, of the balls is conserved. This simply means that the total momentum before the collision is the same as the total momentum after the collision.
This also means that the energy must be conserved as well. The balls cannot fling away from each other with more energy than you give them.
What’s the question? I may be able to help
Nitrogen (like70ish % and oxygen like 20%)