5. Your 300 mL cup of coffee is too hot to drink when served at 90 °C. What is the mass of anice cube, taken from -20 °C freezer that will cool your coffee to a pleasant 60 °C? Specific heatcapacity of iceLatent heat for fusion = 330000 J/kg= 2090 J/kgK.6. A 55-kg woman cheats on her diet and eats a 540-Calorie (540 kcal) jelly doughnut for breakfast.(a) How many joules of energy are equivalent of one jelly doughnut?(b) How many stairs must the woman climb to perform an amount of mechaical energy workequivalent to the food energy in one jelly doughnut? Assume the height of a single stair is15 cm.

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5. Your 300 mL cup of coffee is too hot to drink when served at 90 °C. What is the mass of an ice cube, taken from -20 °C freezer that will cool your coffee to a pleasant 60 °C? Specific heat capacity of ice Latent heat for fusion = 2090 J/kgK. = 330000 J/kg

5. Your 300 mL cup of coffee is too hot to drink when served at 90 °C. What is the mass of an ice cube, taken from -20 °C freezer that will cool your coffee to a pleasant 60 °C? Specific heat capacity of ice Latent heat for fusion = 2090 J/kgK. = 330000 J/kg

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

5. Your 300 mL cup of coffee is too hot to drink when served at 90 °C. What is the mass of an
ice cube, taken from -20 °C freezer that will cool your coffee to a pleasant 60 °C? Specific heat
capacity of ice
Latent heat for fusion = 330000 J/kg
= 2090 J/kgK.
6. A 55-kg woman cheats on her diet and eats a 540-Calorie (540 kcal) jelly doughnut for breakfast.
(a) How many joules of energy are equivalent of one jelly doughnut?
(b) How many stairs must the woman climb to perform an amount of mechaical energy work
equivalent to the food energy in one jelly doughnut? Assume the height of a single stair is
15 cm.

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