A body cools from 100^@C to 70^@C in 4 m...

A body cools from `100^@C` to `70^@C` in 4 minute. If the room temperature is `15^@C` the time taken to cool from `70^@C` to `40^@C` will be

A

7 minute

B

6 minute

C

5 minute

D

4 minute

Text Solution

Verified by Experts

Topper's Solved these Questions

Sound
TARGET PUBLICATION|Exercise Exercise|248 Videos

Similar Questions

Explore conceptually related problems

A body cools from 51^@C to 50.9^@C in 10 sec. If surrounding temperature is 31^@C . The time taken to cool from 41^@C to 40.9^@C will be

A pan filled with hot food cools from 94^@C to 86^@C in 2 minutes. When the room temperature is 20^@C . How long will it take to cool from 74^@C to 66^@C ?

A body cool from 90^@C to 70^@C in 10 minutes if temperature of surrounding is 20^@C . find the time taken by body to cool from 60^@C to 30^@C . Assuming Newton’s law of cooling is valid.

A cup of tea cools from 80^(@)C to 60^(@)C in one minute. The ambient temperature is 30^(@)C . In cooling from 60^(@)C to 50^(@)C it will take

A body in laboratory takes 4 minutes to cool from 6 1 °C to 59 °C. If the laboratory temperature is 30° C, then the time taken by it to cool from 51 °C to 49 °C will be

A body cools from 62^@C to 50^@C in 10 minutes. If the surrounding temperature is 26^@C the temperature at the end of next 10 minutes is A. 38^@C B. 45^@C C. 42^@C D. 40^@c

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

A liquid cools down from 70^@C to 60^@C in 5 minute. The time taken to cool it from 60^@C to 50^@C will be

A liquid cools from 70^@C to 60^@C in 5 minutes. If the temperature of the surrounding is constant at 30^@C , then the time taken by the liquid to cool from 60^@C to 50^@C is

A metal sphere cools from 80^@C to 60^@C in 6 minutes. How much time will it take to cool from 60^@C to 40^@C if the room temperature is 30^@C ?

TARGET PUBLICATION-Thermal Properties of Matter-Exercise

A metal sphere cools from 64 °C to 55 °C in 10 minutes and to 42 °C in...
Text Solution
|
Two rods of length L1 and L2 are made up of different material whose c...
Text Solution
|
A body cools from 100^@C to 70^@C in 4 minute. If the room temperature...
Text Solution
|
Heat transfer takes place between the system and surrounding medium un...
Text Solution
|
The sum of all energies of all molecules in a body is called A. Kine...
Text Solution
|
When three identical thermometers marked kelvin, celsius and fahrenhei...
Text Solution
|
Which of the following temperature will read the same value on celsius...
Text Solution
|
At what temperature the reading of fahrenheit thermometer will be doub...
Text Solution
|
The equal temperature value for Kelvin and Fahrenheit scales is
Text Solution
|
At absolute zero, every substance in nature has
Text Solution
|
Real gases obey ideal gas laws more closely at
Text Solution
|
If a given mass of gas occupies a volume 60 m^3 one atmospheric pressu...
Text Solution
|
(PV)/3=RT, V represents volume of
Text Solution
|
Two thermally insulated vessels 1 and 2 are filled with air at tempera...
Text Solution
|
As the temperature of the solid increases
Text Solution
|
A litre of alcohol weighs
Text Solution
|
A closed bottle containing water at 30^@C is carried to the moon in a ...
Text Solution
|
Two iron bars of same length with unequal radii are heated for the sam...
Text Solution
|
A steel scale gives correct reading at t1^@C. When temperature changes...
Text Solution
|
When a bimetallic strip is heated, it
Text Solution
|