Question

the unit of energy in SI system is____​

Answer 1

Answer:

Joule ( J )

Explanation:

Hope it will help you.

Answer 2

Answer:

SI unit of energy is Joule (J)

Explanation:

As energy is defined via work, the SI unit of energy is the same as the unit of work – the joule (J), named in honour of James Prescott Joule and his experiments on the mechanical equivalent of heat. In slightly more fundamental terms, 1 joule is equal to 1 newton metre and, in terms of SI base units

{\displaystyle 1\ \mathrm {J} =1\ \mathrm {kg} \left({\frac {\mathrm {m} }{\mathrm {s} }}\right)^{2}=1\ {\frac {\mathrm {kg} \cdot \mathrm {m} ^{2}}{\mathrm {s} ^{2}}}}1\ {\mathrm {J}}=1\ {\mathrm {kg}}\left({\frac {{\mathrm {m}}}{{\mathrm {s}}}}\right)^{2}=1\ {\frac {{\mathrm {kg}}\cdot {\mathrm {m}}^{2}}{{\mathrm {s}}^{2}}}

An energy unit that is used in atomic physics, particle physics and high energy physics is the electronvolt (eV). One eV is equivalent to 1.60217653×10−19 J.

In spectroscopy the unit cm−1 ≈ 0.0001239842 eV is used to represent energy since energy is inversely proportional to wavelength from the equation {\displaystyle E=h\nu =hc/\lambda }E=h\nu =hc/\lambda .