Question

How many joules are there in a candy bar containing $230,000$calories?

Answer 1

Hint: The derived unit of the energy is known as Joules. In the field of physics, one joule is equal to the one work done. By finding the value of one calorie in one joule, the answer can be found.

Complete step by step answer:
To answer the given question, first, let us know the terms Joule and calorie. One joule can be defined as the following:
The work that is required to move an electric charge through one coulomb through an electrical potential difference of one volt. With the help of this difference, the definition of a volt can be explained.
The work that is required to produce one watt of power for one second. With the help of this difference, the definition of the watt can be explained.
The unit of energy is called calorie. The energy that humans consume after eating any food item is known as calorie.
Now we can try to answer the given question. With the help of one caloric value, the joules in the candy bar can be found.
The value of one calorie is $4.18$joules. That is,
$\Rightarrow 1Calory=4.18Joules$
By multiplying the value of one calorie with $230,000$ calories of candy bar we have,
$\Rightarrow Joules=230,000\times 4.18joules$
$\Rightarrow Joules=961,400joules$
Therefore, $961,400joules$ are there in a candy bar containing $230,000$calories.

Note:
The joule is the standard S.I unit of energy, all the convertible values to the joules are used in certain circumstances. They include energy, the foot-pound, watt second, watt-hour, thermochemical calorie, kilocalorie, kilowatt-hour, inverse meter, inverse second, etc.