hcal [IT](hectocalorie)

In the field of energy, a hectocalorie (symbol: hcal or hCal), sometimes referred to as a "large calorie" or "food calorie", is a unit of energy that is equal to 100 calories. The calorie (cal) is a commonly used unit of energy, especially in the context of food and nutrition, where it refers to the amount of energy provided by the consumption of different types of food.

One calorie is the amount of energy required to raise the temperature of 1 gram of water by 1 degree Celsius (1.8 degrees Fahrenheit) at a standard atmospheric pressure. The hectocalorie, being equal to 100 calories, is the amount of energy needed to raise the temperature of 100 grams of water.

It is important to note that in the energy and nutrition fields, when people refer to "calories" in the context of food and diets, they usually mean "kilocalories" (1 kcal = 1000 cal) or "hectocalories" (1 hcal = 100 cal), which is why you might see some confusion when trying to understand the energy value of different types of food.

µW h(microwatt hour)

A microwatt hour (µWh) is a unit of energy used to express small amounts of energy consumption or generation, especially in the context of low-power electronic devices or systems. It is a derived unit from the International System of Units (SI) and falls under the category of energy, work, or amount of heat.

The microwatt hour (µWh) represents one millionth (10^-6) of a watt-hour (Wh), which is a widely recognized energy unit. A watt-hour is the amount of energy consumed or generated by a one-watt device operating for one hour. Therefore, one microwatt hour is equivalent to a one-microwatt (µW) device operating for one hour or using one millionth of a watt's worth of energy for one hour.

This unit of measurement is often used in various applications such as analyzing the energy consumption of electronic components like integrated circuits, sensors, and other low-power devices that operate in the microwatt range.