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raulflores01
12.07.2019 •
Physics
A2in. piece of chocolate cake with frosting provides 1670 kj of energy. what is this in dietary calories(cal)
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Ответ:
399.1 dietary calories
Explanation:
A 2in. piece of chocolate cake with frosting provides 1670 kJ (1670 × 10³ J) of energy. We can express this in calories, knowing that 1 cal = 4.184 J.
1670 × 10³ J × (1 cal/4.184 J) = 3.991 × 10⁵ cal
The dietary calorie is an energy unit commonly used to describe the energy content of foods and 1 dietary calorie = 1 kcal = 10³ cal. The energy in dietary calories corresponding to 3.991 × 10⁵ calories is:
3.991 × 10⁵ cal × (1 dietary calory/ 10³ cal) = 399.1 dietary calory
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When we pull the piston from inside to outside, a suction is created between the liquid and piston. This causes the liquid to move upwards and this allows us to draw a drug from a bottle
Explanation: