Answer:
E = 124 eV
Explanation:
Given,
The frequency of the X-rays, ν = 3.0 x 10¹⁰ Hz
The formula for calculating the energy of the electromagnetic waves of a single photon of having frequency 'ν' is given by the relation
E = hν joules
Where,
h - Planck's constant (6.626 x 10⁻³⁴ Js)
Substituting the values in the above equation
E = 6.626 x 10⁻³⁴ Js x 3.0 x 10¹⁰ Hz
= 1.9878 x 10⁻²³ J
Converting it into eV
E = 1.9878 x 10⁻²³ x 6.242 x 10¹⁸ eV
= 124 eV
Therefore, the energy in electron volts of X-rays is, E = 124 eV
Answer:
P = mgh/t = 61(9.8)(0.32)/1.8 = 106.275555... ≈ 110 W
Explanation:
Power is the rate of doing work.
The work changes her potential energy.
Only velocity uses direction of travel in its calculations.
Answer:
i cant see the the pic its glitched post a new one i will help
Explanation:
Answer:
15
Explanation:
The mass number is defined as the total number of protons and neutrons. The atomic number is total number of protons. And since we have the mass number and number of neutrons, we can use simple subtraction (30 - 15) to find that the atomic number is 15.