Mastering Physics: Problems from Chapter 14 Secure https:// masteringphysics.com
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Mastering Physics: Problems from Chapter 14 Secure https:// masteringphysics.com. 73108467 session. PHY 166, Introductory Physics, Part I Signed in as Fatima Muftau Help I close Problems from Chapter 14 Problem 14.29 Resources previous l 4 of 9 l next Problem 14.29 Part A High-altitude mountain climbers do not eat snow. Calculate the energy absorbed from a climbers body if he eats 0.55 kg of -15°C snow which his body but always melt it first with a stove. To see why, warms to body temperature of 37°C. calculate the energy absorbed from a climber's Express your answer to two significant figures and include the appropriate units. body under the following conditions. The specific of is 2100 J/kg. latent fusion is 333 kJ/kg, the specific heat of water is 4186 J/kg. Co Value Units Submit My Answers Give Up incorrect, Try Again; 3 attempts remaining Part B Calculate the energy absorbed from a climbers body if he melts 0.55 kg of -15 C snow using a stove and drink the resulting 0.55 kg of water at 2 C, which his body has to warm to 37 C. Express your answer to two significant figures and include the appropriate units. Q2 Value Units Submit My Answers Give UpExplanation / Answer
part A:
energy absorbed=heat required to bring the temperature of ice from -15 degree celcius to 0 degree celcius+heat required to completely melt the ice+heat required to bring the temperature of melted water from 0 degree to 37 degrees
=mass of ice*specific heat of cie*temperature difference+mass of ice*latent heat of fusion of ice+mass of water*specific heat of water*temperature difference
=0.55*2100*(0-(-15))+0.55*333*1000+0.55*4186*(37-0)
=285660.1 J
part B:
heat abosrbed =energy required to bring temperature from 2 degree celcius to 37 degree celcius
=0.55*4186*(37-2)
=80580.5 J