Question

a light source transfers 20 j of energy into 4 j of light and some heat energy . calculate how much energy is transferred into heat ?

Answer 1

5 joule energy will be transmit.

Given: 20 j of energy into 4 j of light

To find: energy which is transferred into heat

Solution:

Thermodynamics, learning of the connection 'tween heat, work, hotness, and strength. In broad agreements, thermodynamics handles the transfer of strength from individual place to another and from individual form to another. The key idea is that heat is a form of strength matching to a positive amount of machinelike work.Heat was not in an official manner acknowledged as a form of strength just before about 1798, when Count Rumford (Sir Benjamin Thompson), a British military engineer, seen that never-ending amounts of heat maybe create in the uninteresting of howitzer barrels what the amount of heat produce is equivalent to whole exhausted curving a blunt uninteresting form.

Rumford’s scrutiny of the proportion middle from two points heat create and work accomplished lies at the company of thermodynamics. Another pioneer was the French military engineer Sadi Carnot, the one made acquainted the idea of the heat-transformer phase and the law of reversibility in 1824. Carnot’s work worried the restraints on the maximum amount of work that maybe acquired from a energy weapon operating accompanying a extreme-hotness heat transfer as allure hidden motive. Later that of one hundred years, these plans were grown by Rudolf Clausius, a German mathematician and researcher, into the first and second regulations of thermodynamics, individually.

Lets calculate it through formula of thermodynamics:

$q = 20/4\\q=5 J$

So 5 joule energy has been transferred.

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