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Traditionally Heat was measured in calories cal Traditionally Heat was measured in calories cal

Traditionally Heat was measured in calories cal - PDF document

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Uploaded On 2022-08-20

Traditionally Heat was measured in calories cal - PPT Presentation

1 calorie is an amount of heat needed to increase the temperature of 1g of water by 1 o C For nutritionaldietary purposes people use big Calories Cal with capital C 1 Cal ID: 938702

water heat cal energy heat water energy cal temperature dietary joules 1cal run problem purposes 1000cal increase needed amount

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Traditionally, Heat was measured in calories (cal): • 1 calorie is an amount of heat needed to increase the temperature of 1g of water by 1 o C. • For nutritional/dietary purposes people use “big Calories” (Cal, with capital “C”). 1 Cal=1000cal (or simply kilocalorie). By definition, this is an amount of heat needed to increase the temperature of 1 kg (1 liter) of water by 1 o C. • Heat is a form or energy, so calories can be converted to Joules: 1cal=4.184J 1Cal

=1000cal=4184J(used for dietary purposes) Heat Homework Problem 1 How much energy, in Joules, do you consume with each standard serving of your favorite food (check the nutrition label)? Assuming that you need about 70 , 000 J to run 1 mile, what distance can you run on one serving? Problem 2 A droplet of water falls from the height h=1000m, onto a thermally isolating surface. Assume that all mechanical energy goes to heating the water. Find the change in its temperature ΔT.