14_InstSolManual_PDF_Part15 - Temperature and Heat 14-15...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Solve: so and Reflect: For water, A small mass of steam melts a larger mass of ice and also raises the temperature of the water. 14.82. Set Up: Neglect the effect of the increase in thickness of the ice on the rate of heat conduction, so H remains constant. For water, Consider an area A of ice. Ice has density The thermal conductivity of ice is Solve: The mass of the 2.00 mm thickness of ice is The amount of heat conducted through the ice in time t is Therefore, and 14.83. Set Up: The emissivity of a human body is taken to be 1.0. In the equation for the radiation heat current the temperatures must be in kelvins. Solve: (a) (b) The person gains 87.1 J of heat each second by radiation. (c) The total excess heat per second is (d) In the runner must dispose of If this much heat goes to evap- orate water, the mass m of water that evaporates in one minute is given by so (e) In a half-hour, or 30 minutes, the runner loses The runner must drink 0.84 L, which is Reflect: The person gains heat by radiation since the air temperature is greater than his skin temperature.
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern