calorie

Chemistry

(noun)

The amount of energy needed to raise the temperature of 1 gram of water by 1 °C. It is a non-SI unit of energy equivalent to approximately 4.18 Joules. A Calorie (with a capital C) = 1000 calories.

Related Terms

  • bomb calorimeter
  • adiabatic
Physics

(noun)

The energy needed to increase the temperature of 1 kilogram of water by 1 kelvin. It is equivalent to 1,000 (small) calories.

Related Terms

  • oxidation
  • metabolism

Examples of calorie in the following topics:

  • Contour Plots

    • Consider the Figure 1 that contains data on the fat, non-sugar carbohydrates, and calories present in a variety of breakfast cereals.
    • Each line shows the carbohydrate and fat levels for cereals with the same number of calories.
    • The areas with the same number of calories are shaded.
    • A contour plot showing calories as a function of fat and carbohydrates
    • A contour plot showing calories as a function of fat and carbohydrates with areas shaded.
  • 3D Plots

    • Figure 1 shows a 3D scatter plot of the fat, non-sugar carbohydrates, and calories from a variety of cereal types.
    • A 3D scatter plot showing fat, non-sugar carbohydrates, and calories from a variety of cereal types
    • An alternative 3D scatter plot showing fat, non-sugar carbohydrates, and calories.
  • Heat as Energy Transfer

    • The calorie (cal) is a common unit of energy, defined as the energy needed to change the temperature of 1.00 g of water by 1.00ºC —specifically, between 14.5ºC and 15.5ºC, since there is a slight temperature dependence.
    • Food calories (given the notation Cal, and sometimes called "big calorie") are actually kilocalories (1kilocalorie=1000 calories), a fact not easily determined from package labeling in the United States, but more common in Europe and elsewhere.
  • Fitting a line by least squares regression exercises

    • The scatterplot below shows the relationship between the number of calories and amount of carbohydrates (in grams) Starbucks food menu items contain.
    • Since Starbucks only lists the number of calories on the display items, we are interested in predicting the amount of carbs a menu item has based on its calorie content.
    • (a) Describe the relationship between number of calories and amount of carbohydrates (in grams) that Starbucks food menu items contain.
    • Based on the scatterplot and the residual plot provided, describe the relationship between the protein content and calories of these menu items, and determine if a simple linear model is appropriate to predict amount of protein from the number of calories.
  • Hypothesis testing exercises

    • (a) Since 2008, chain restaurants in California have been required to display calorie counts of each menu item.
    • Prior to menus displaying calorie counts, the average calorie intake of diners at a restaurant was 1100 calories.
    • After calorie counts started to be displayed on menus, a nutritionist collected data on the number of calories consumed at this restaurant from a random sample of diners.
    • A random sample of 35 bags yielded a sample mean of 134 calories with a standard deviation of 17 calories.
    • The data do not provide convincing evidence that the true average calorie content in bags of potato chips is different than 130 calories.
  • Constant-Volume Calorimetry

    • Bomb calorimetry is used to measure the heat that a reaction absorbs or releases, and is practically used to measure the calorie content of food.
    • For instance, if we were interested in determining the heat content of a sushi roll, for example, we would be looking to find out the number of calories it contains.
  • Importance of Carbohydrates

    • Calorie-wise, a gram of carbohydrate provides 4.3 Kcal.
    • A low-calorie diet that is rich in whole grains, fruits, vegetables, and lean meat, together with plenty of exercise and plenty of water, is the more sensible way to lose weight.
  • Proteins: Sources, Uses in the Body, and Dietary Requirements

    • It should not be confused with low-carb diets, such as the Atkins Diet, which are not calorie-controlled and which often contain large amounts of fat.
    • Extreme protein intake (in excess of 200g per day), coupled with inadequate intake of other calorie sources (fat or carbohydrates), can cause a form of metabolic disturbance and death commonly known as rabbit starvation.
  • Transferring of Energy between Trophic Levels

    • The lion is missing the energy-rich bone marrow inside the bone, so the lion does not make use of all the calories its prey could provide.
    • For example, it costs about $0.01 to produce 1000 dietary calories (kcal) of corn or soybeans, but approximately $0.19 to produce a similar number of calories growing cattle for beef consumption.
  • Homework

    • The percent of fat calories that a person in America consumes each day is normally distributed with a mean of about 36 and a standard deviation of 10.
    • Let X = percent of fat calories.
    • Find the probability that the percent of fat calories a person consumes is more than 40.
    • Find the maximum number for the lower quarter of percent of fat calories.
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