Q 2.3: A calorie is a unit of heat (energy in transit) and it equals about 4.2 J where . Suppose we employ a system of units in which the unit of mass equals , the unit of length equals , the unit of time is . Show that a calorie has a magnitude 4.2 in terms of the new units.
Given new unit of mass = (In old unit 1kg corresponded to a unit mass, but in new unit corresponds to a unit mass)
In terms of the new unit,
Similarly in terms of new units, and