What is the energy equivalent of 5.0kg of mass?

Answer : The energy equivalent if 5 kg of mass is

Explanation :

Given that,

Mass, m = 5 kg

From Einstein's mass - energy equivalence relation :

E is energy

m is the mass of the object

c is the speed of light

Hence, this is the required solution.

powerful computers now, not then

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m