Because the atoms and molecules all have different properties
Its very simple if a body is moving in circle the magnitude of its velocity remain constant but its direction changes because velocity is directed towards tangent and at every point in a cirlce its direction will be different (along tangent) so velocity is not uniform .As acceleration is the rate change of velocity so it will be non zero because velocity is changing due to its direction.
While he is lifting the dumbell as the definition of work done = moving a mass through a distance = F x d
Answer:
Wavelength,
Explanation:
The energy of the electron in a hydrogen atom can be calculated from the Bohr formula as :
.............(1)
Where
R is the Rydberg constant
n is the number of orbit
We need to find the wavelength of the line in the absorption line spectrum of hydrogen caused by the transition of the electron from an orbital with to an orbital with n₁ = 2 to an orbital with n₂ = 3.
Equation (1) can be re framed as :



or

So, the the wavelength of the line in the absorption line spectrum is 657 nm. Hence, this is the required solution.
Answer:
0 1 2 3 4 . because the particle moved with a constant acceleration