What are the abbreviation representation for scientific calories, food calories and SI units of energy?

I don't know how standard this is but I've always used cal for calorie for science and kcal for kilocalorie for science.

Food calories are called calories but the calories we count when we eat and read about in diets actually are kilocalories. Many nutritionists differentiate by calling the calorie a SMALL calorie and using a lower case c for that or a LARGE calorie or BIG calorie and using an upper case C. Therefore, a C actually is a kilocalorie. In science (SI), energy is measured in joules with 4.184 joules = 1 calorie (1 small calorie). The SI abbreviation is J.

The abbreviation representations for scientific calories, food calories, and SI units of energy are as follows:

1. Scientific calories: cal or cal (lowercase)
2. Food calories: Cal or Cal (uppercase). It is also commonly referred to as kilocalorie (kcal).
3. SI units of energy: The International System of Units (SI) uses the unit joule (J) as the standard unit for energy.

The abbreviation representation for scientific calories is "cal", for food calories it is "kcal", and for SI units of energy it is "J" (Joules).

To understand how these abbreviations are used, let's break it down:

1. Scientific calories (cal): This is a unit of energy commonly used in chemistry and physics. One calorie is defined as the amount of energy required to raise the temperature of 1 gram of water by 1 degree Celsius. For example, if a chemical reaction releases 1000 calories of energy, it means it can raise the temperature of 1000 grams of water by 1 degree Celsius.

2. Food calories (kcal): In the context of nutrition and food, the term "calorie" is often used to represent kilocalorie. One kilocalorie (kcal) is equal to 1000 calories. It is used to measure the energy content of food. For instance, if a food item contains 200 kilocalories, it means it provides 200,000 calories of energy when consumed.

3. SI units of energy (J): The International System of Units (SI) is a standardized system used in scientific measurements. The SI unit for energy is the Joule (J), named after James Prescott Joule. It is a derived unit and can be defined in terms of other base units like mass, length, and time. 1 calorie is approximately equal to 4.184 joules.

So, in summary, scientific calories are represented as "cal", food calories are represented as "kcal", and SI units of energy are represented as "J".