SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Q
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t
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m
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C
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Detailed explanation-1: -The thermal energy equation is given as Q=mcT. where Q is the symbol for heat transfer, m is the mass of the substance, and T is the change in temperature.
Detailed explanation-2: -The transfer of heat energy is defined as heat flux, Q. By definition, this is the flow of heat energy through a defined area over a defined time. So, the units for Q are Joules (energy) divided by area (square meters) and time (seconds).
Detailed explanation-3: -In the “memoir on heat”, already the terminology is used and q is there, after heat being called “quantity of heat”, page 191. The original must have been in french. Assigning symbols to physics quantities depends on the first people who used them a lot, and then convenience follows the serendipity.