A pan filled with hot food cools from 94...

A pan filled with hot food cools from `94^(@)C` to `86^(@)C` in 2 minutes when the room temperature is at `20^(@)C`. How long will it take to cool from `71^(@)C` to ` 69^(@)C`? Here cooling takes place according to Newton's law of cooling.

Topper's Solved these Questions

HEAT TRANSFER
BANSAL|Exercise Exercise|89 Videos
GRAVITATION
BANSAL|Exercise EXERCISE -4 Section - B|6 Videos
KINETIC THEORY OF GASES
BANSAL|Exercise Section-B|13 Videos

Similar Questions

Explore conceptually related problems

A liquid contained in a beaker cools from 80^(@)C to 60^(@)C in 10 minutes. If the temperature of the surrounding is 30^(@)C , find the time it will take to cool further to 48^(@)C . Here cooling take place ac cording to Newton's law of cooling.

A body cools from 50^(@)C to 49.9^(@)C in 5 s. the temperature of the surroundings is 30^(@)C . How long will the body, take to cool from 40^(@)C to 39.9^(@)C ?

A metal sphere cools from 72^(@)C to 60^(@)C in 10 minutes. If the surroundings temperature is 36^(@)C , then the time taken by it to cool from 60^(@)C to 52^(@)C is

A body cools from 50^(@)C to 40^(@)C is 5 minutes when its surrounding are at a constant temperature of 20^(@)C . How long will it take for it to cool by another 10^(@)C ?

A body cools from 80^(@)C to 60^(@)C in 5 minutes. Then its average rate of cooling is

A body takes, 4 minutes to cool from 100^(@)C to 70^(@)C , if the room temperature is 25^(@)C , then the time taken to cool from 70^(@)C to 40^(@)C will be

A body cools from 70^(@)C to 50^(@)C in 6 minutes when the temperature of the surrounding is 30^(@)C . What will be the temperature of the body after further 12 minutes if coolilng proseeds ac cording to Newton's law of cooling ?

A body cools from 70^(@)C to 60^(@)C in 8minute The same body cools from 60^(@)C to 50^(@)C in .

BANSAL-HEAT TRANSFER-Exercise

A composite cylinder is made of two materials having thermal conductiv...
Text Solution
|
A metal sphere with a black surface and radius 30 min, is cooled to -7...
Text Solution
|
A pan filled with hot food cools from 94^(@)C to 86^(@)C in 2 minutes ...
Text Solution
|
A body cools from 50^(@)C to 40^(@)C in 5 minutes. The surrounding tem...
Text Solution
|
One end of a 2.35m long and 2.0cm radius aluminium rod (K=235W.m^(-1)K...
Text Solution
|
The rate of emission of radiation of a black body at 273^(@)C is E, th...
Text Solution
|
Stars S(1) emits maximum radiation of wave length 420nm and the star S...
Text Solution
|
A black body calorimeter filled with hot water cools from 60^(@)C to 5...
Text Solution
|
From Kirchoff's law the ratio of emissive power and absorption power o...
Text Solution
|
If at temperature T, the emissive power and absorption power of a body...
Text Solution
|
During total solar eclipse Fraunhoffer's lines appear bright because -
Text Solution
|
A polished metal plate with a rough black spot on it is heated to abou...
Text Solution
|
The temperature of a body is increased by 50%. The amount of radiation...
Text Solution
|
Radius of a shere is R density is d and specific heat is s, Is is heat...
Text Solution
|
If a body at 27^(@)C emits 0.3 watt of heat then at 627^(@)C, it will ...
Text Solution
|
If the rate of emission of radiation by a body at temperature TK is E ...
Text Solution
|
A liquid takes 10 minutes to cool from 80^(@)C to 50^(@)C. The tempera...
Text Solution
|
A metallic sphere cools from 50^(@)C to 40^(@)C in 300 seconds. If the...
Text Solution
|
Two stars A and B radiate maximum energy at wave lengths 4000Å and 500...
Text Solution
|
Four rods with different radii r and length l are used to connect two ...
Text Solution
|