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In newton's law of cooling in the form ...

In newton's law of cooling in the form
`(dDeltatheta)/(dt)=-kDeltatheta`
What factors does the constant k depend upon? What are the dimensions of k?

Text Solution

Verified by Experts

The constant k depends on materials, shape nature of the surface, and air currents. Its dimensions are `T^-1`.
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CENGAGE PHYSICS-CALORIMETRY-Exercise 1.3
  1. Explain why the surface of a lake freezes first.

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  2. In newton's law of cooling in the form (dDeltatheta)/(dt)=-kDeltathe...

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  3. A thermocole cubical icebox of side 30 cm has a thickness of 5.0 cm if...

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  4. A brass boiler has a base area of 0.15m^2 and thickness 1.0 cm it boil...

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  5. An electric heater is placed inside a room of total wall area 137 m^2...

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  6. An indirectly heated filament is radiating maximum energy of wavelengt...

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  7. A uniform copper bar 100 cm long is insulated on side, and has its end...

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  8. Two rods A and B of same length and cross-sectional area are connected...

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  9. Two conductors A and B given in previous problem are connected in para...

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  10. A sphere, a cube and a thin circular pate are heated to the same tempe...

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  11. One end of a brass rod of length 2.0 m and cross section 1cm^2 is kept...

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  12. Three rods AB, BC and BD having thermal conductivities in the ratio 1:...

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  13. Thermal conductivity of inner core of radius r is K and of the outer o...

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  14. A cylinder of radius R and length l is made up of substance whose ther...

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  15. A cube and a sphere of equal edge and radius, made of the same substan...

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  16. A spherical ball of radius 1cm coated with a metal having emissivity 0...

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  17. A body emits maximum energy at 4253 Å and the same body at some other ...

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  18. A black body at 1500K emits maximum energy of wavlength 20000Å. If sun...

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