Question

As a coffee enthusiast you wish to keep your coffee as hot as possible for as long as possible. You wish to find the rate of heat loss of a typical coffee mug. Assume the mug to be a cylinder which has a lid made out of the same material as the rest of the cylinder, and the thickness of the walls is 1.51 cm. If the coffee in the mug is 77.1°C and the room temperature is 20.8 °C how much more heat does the mug lose througłh conduction than from radiated energy. See the hint below for important constants. Number The mug loses heat by conduction times more quickly than by radiation

Answer 1

In this problem first we will find the heat loss by conduction,

P conduction = Q/t

after we will find the heat loss by radiation,

then after we will find the mug losses heat by conduction how many times more quickly than by radiation.
が, Given hat hi CK ness of the wallsこ1.51cm @ffee mw tCrreratne - тіґс hen Heat loss Conduction is Conductiow where dl KADL Conduchon Conduch ơn dl whete 0.873 (omluckom O.833 x (77.1 c- 20.8 C 리 .51 x1o m 0,173 56.3 0.0151