A body at 50^(@)C cools in a surrounding...

A body at `50^(@)C` cools in a surroundings maintained at `30^(@)C`. The temperature at which the rate of cooling is half that of the beginning is

`30^(0)C`

`40^(0)C`

`32^(0)C`

`42^(0)C`

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

TRANSMISSION OF HEAT
AAKASH SERIES|Exercise LECTURE SHEET (EXERCISE-II) Thermal Radiation (More than One correct answer Type Questions)|3 Videos
TRANSMISSION OF HEAT
AAKASH SERIES|Exercise LECTURE SHEET (EXERCISE-II) Thermal Radiation (Linked Comprehension Type Questions) Passage-I|3 Videos
TRANSMISSION OF HEAT
AAKASH SERIES|Exercise LECTURE SHEET (EXERCISE-I) Thermal Conduction (Integer Type Questions)|5 Videos
TRANSMISSION OF HEAT
AAKASH SERIES|Exercise QUESTION FOR DESCRIPTIVE ANSWER|4 Videos
UNITS AND MEASUREMENT
AAKASH SERIES|Exercise Practice Exercise|45 Videos

Similar Questions

Explore conceptually related problems

A body at 50^(@) C cools in a surroundings maintained at 30^(@) C. The temperature at which the rate of cooling is half that of the begining is

A hot body is placed in cooler surroundings. When the body temperature is 75^(@)C , the rate of cooling is 4^(@)C//min . When it is 55^(@)C , the rate of cooling is 2^(@)C//min . The temperature of the surroundings is

A frog with body temperature of 20^@C is transferred to an area with 30^@C temperature. What will be the body temperature of frog in the new environment?

A body cools from 70^(@)C to 50^(@)C in 5 minutes. Temperature of surroundings is 20^(@)C . Its temperature after next 10 minutes is

A body takes 8 minutes to cool from 90^(@) C to 80^(@) C in a surrounding of temperature 25^(@) C. The time taken by it to cool from 80^(@)C " to" 70^(@) C in the same surroundings is

A body cools form 50^(0)C to 40^(0)C in 6 minutes. When its surroundings temperature is 30^(0)C , what will be its temperature 12 min after the start of the experiment? Surrounding temperature remains the same ?

A liquid initially at 75^(0)C cools to 55^(0)C in 12.5 minutes and to 45^(0)C in 10 minutes. Which of the following temperatures is not that of the surroundings

AAKASH SERIES-TRANSMISSION OF HEAT-LECTURE SHEET (EXERCISE-II) Thermal Radiation (Straight Objective Type Questions)

A black body does not
Text Solution
|
In summer, a mild wind is often found on the shore of a calm river. Th...
Text Solution
|
A piece of charcoal and a piece of shining steel of the same area are ...
Text Solution
|
The emissivity of tungsten is approximately 0.35. A tungsten sphere 1 ...
Text Solution
|
Consider a block of copper of radius 5 cm. Its outer surface is coated...
Text Solution
|
A solid copper sphere (density rho and specific heat c) of radius r at...
Text Solution
|
Two solid spheres of same ,naterial but diameters in the ratio of 5 : ...
Text Solution
|
Two identical bodies of emissivities 0.01 and 0.16 and at different te...
Text Solution
|
'Gulab Jamuns' (assumed to be spherical) are to be heated in an oven. ...
Text Solution
|
If the total surface area of human body is 1.2m^(2) and the surface te...
Text Solution
|
Two solid steel cylinders A and B of same temperature (higher than the...
Text Solution
|
The power radiated by a black body is P, and it radiates maximum energ...
Text Solution
|
A solid cuboid with edges 1 cm, 2 cm and 3 cm is suspended in vacuum, ...
Text Solution
|
A flat rectangular surface of dimension 15" cm"xx2" cm" is placed perp...
Text Solution
|
A body at 50^(@)C cools in a surroundings maintained at 30^(@)C. The t...
Text Solution
|
A body cools form 50^(0)C to 40^(0)C in 6 minutes. When its surroundin...
Text Solution
|
A sphere of ice at 0^(@)C having initial radius R is placed in an envi...
Text Solution
|
Four spheres A, B, C and D of different metals but of same radius are ...
Text Solution
|
Temperature of a body theta is slightly more than the temperature of t...
Text Solution
|
A body having temperature 27^(0)C is kept in a room having temperature...
Text Solution
|