From what I understand, the word midnight is usually interpreted incorrectly. Midnight is written as 12am which would imply that it's in the morning. Therefore, it should be at the start of the day. On the other hand, both Dictionary.com and the Oxford Dictionary define it as twelve o'clock at night.
James Prescott Joule. The English physicist James Prescott Joule (1818-1889) proved that mechanical and thermal energies are interconvertible on a fixed basis, and thus he established the great principle of conservation of energy.
One joule can also be defined as: 1  The work required to move an electric charge of one coulomb through an electrical potential difference of one volt, or one 'coulomb volt (CÂ·V). 2  The work required to produce one watt of power for one second, or one watt second (WÂ·s) (compare kilowatt hour - 3.6 megajoules).