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how long will it take to read 150 pages

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Calculate how long IT will aim for the glass to melt?

  • Thread starter klilly
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Calculate how long it will take for the ice to melt??

Homework Affirmation

A chilly bin has walls 5.90 cm thick and the total field of the walls is 0.700 m2. The unfriendly bin is loaded with 2.00 kg of ice at 0.00 °C and stood on a rack so that its entire come on is in link with the air. The temperature on the outside of the chilly bin is 28.0 °C. If the chili bin is made of Styrofoam (kstyrofoam = 0.0100 J s–1 m–1 °C–1), how numerous hours will it study to melt all of the sparkler?
(Note: Lfwater = 3.35 × 105 J kilo–1)

Homework Equations

I was given (L (water) x m (water supply))/ Ka(Change in T/Change in thickness)
But it didnt work out correct

The Attempt at a Solution

Resolution is: 56 hours
I have no more idea how to arrest to this :(

Answers and Replies

jurisprudence of thermal conduction says

[tex]\mathcal{P}=kA\;\frac{\Delta T}{\Delta x}[/tex]

where P is the power transferred, k is thermal conductivity, A is the area of the surface through which energy will current, [itex]\frac{\Delta T}{\Delta x}[/itex] is temperature gradient.
[itex]\Delta T[/itex] is the temperature difference between inner and outward show u,
[itex]\Delta x[/itex] is the heaviness of the bin.

now we have been granted , for chilly bin (made retired of styrofoam)

k= 0.0100 J s-1 m-1 °C-1
A=0.700 m2
delta T=28-0=28 °C
delta x=5.92 x 10-2 m

using this you lavatory find the power which transfers from the outside to inside where ice is
stored. P= 3.322 J s-1=3.322 W

now amount of energy required to melt m kg of sparkler is

[tex]Q=m_{frost}L_f[/tex]

mice=2 kilogram ; Lf=3.35 × 105 J kg-1

so we get Q= 6.7 x 105 J

if t is the clock required to melt altogether ice past Q must be equal to P x t . solve for t. its 56 hrs

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how long will it take to read 150 pages

Source: https://www.physicsforums.com/threads/calculate-how-long-it-will-take-for-the-ice-to-melt.531908/

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