Recent content by annedi

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    Calculating Heat Transfer by Radiation: Copper Block at 250 C and 1200 sq cm

    oh yeah. i just realized that just now.. THANKS AGAIN :)
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    Calculating Heat Transfer by Radiation: Copper Block at 250 C and 1200 sq cm

    there is no more information stated here.. thanks for the help stockzahn. I really appreciated it. this was due today
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    Calculating Heat Transfer by Radiation: Copper Block at 250 C and 1200 sq cm

    the heat flux from copper to water is 2548.23 W/m^2 at 250C.. is this what you mean..
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    Calculating Heat Transfer by Radiation: Copper Block at 250 C and 1200 sq cm

    I'm sorry, I forgot to convert the temperature what i meant by W (area)/ m^2 whatever the area is, you'll plug it in the equation.. so W (x)m^2/m^2 will cancel out thus leaving W as the unit
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    Calculating Heat Transfer by Radiation: Copper Block at 250 C and 1200 sq cm

    is this correct. i computed the Hr as a function of area 132.89 W Area /m^2 70543 W Area/m^2
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    Calculating Heat Transfer by Radiation: Copper Block at 250 C and 1200 sq cm

    The answer must be in joules per second
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    Thermal Radiation Homework: Snow-Covered Surface Absorption

    I searched it. it says that it ranges from 0.969 - 0.997
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    Thermal Radiation Homework: Snow-Covered Surface Absorption

    Homework Statement Consider a snow-covered surface. Assume that the amount of solar radiation that reaches the top of the atmosphere is 1367 Wm-2. Given that 50% of this solar radiation is either absorbed in the atmosphere or reflected by clouds before reaching the the snow covered surface...
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    Calculating Heat Transfer by Radiation: Copper Block at 250 C and 1200 sq cm

    Homework Statement How much heat is radiated in water per sq cm, from a block of copper at 250 C and 1200 . Homework Equations e= 0.6 Hr= (Area)(e)(5.67x10^-8 W/m^2K^4)(temperature)^4 The Attempt at a Solution i'm sorry, i don't know how to solve this one...
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    Calculating Mass and Acceleration with Constant Force and Distance Traveled

    oh yeah.. i get it now.. i was a little confused with the formula a while ago.. THANKS A LOT FOR THE HELP ;)
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    Finding the Initial Temperature of Water in a Calorimeter: A Calorimetry Problem

    please help :( I know the formula, but i don't understand the question1. Homework Statement a 200g calorimeter, with heat capacity = 0.10 cal/g C, contains 300g of water. a 500 g aluminum shot, at 99 Celsius, was poured in the calorimeter. What would be the initial temperature of water in order...
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    Calculating Mass and Acceleration with Constant Force and Distance Traveled

    would this mean.. vf=(5.0m/Time) a=(5.0m / time^2) m= F/a m=40N time^2/5.0m is this right??
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    Calculating Mass and Acceleration with Constant Force and Distance Traveled

    Yes, I have. these are the exact words on the book
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    Calculating Mass and Acceleration with Constant Force and Distance Traveled

    I don't know if this would really help but I'm dealing here "Newton's 2nd Law of Motion" so the formula here is F=ma..
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    Calculating Mass and Acceleration with Constant Force and Distance Traveled

    Yes, I have.. These are the exact words written in the book