Calculate the energy of the violet light emitted by a hydrogen atom with a wavelength of 410.1 nm. a. 1.23 × 10-19 J

b. 8.13 × 10-19 J

c. 4.85 × 10-19 J

d. 2.06 × 10-19 J

e.5.27 x 10-19 J

4.85 x 10⁻¹⁹J

Explanation:

Given parameters:

Wavelength = 410.1nm

Unknown:

The energy of the violet light = ?

Solution:

The energy of a wave can be derived using the expression below;

    E =

h is the planck's constant

c is the speed of light

  Insert the parameters and solve;

      E =   = 4.85 x 10⁻¹⁹J

i just learnt this recently but i need to look through my notes again

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.