A body cools down from 45degree C to 40degree C in 5 min and in another 8 min. Find the tem. of the surrounding.?

EduRev

All Courses

Explore Courses UPSC Exam UPSC Test Series Free Notes EduRev Infinity

Open App

NEET Exam > NEET Questions > A body cools down from 45degree C to 40degree...

Join the Discussion on the App

A body cools down from 45degree C to 40degree C in 5 min and in another 8 min. Find the tem. of the surrounding.?

Join for Free

Join for Free

Verified Answer

A body cools down from 45degree C to 40degree C in 5 min and in anothe...

T0 is the surrounding temperature

in first case

when temperature drops from 80C to 70C in 5 minutes

here, dT = 10C, dt = 5min = 300s

so, we get

-(10/300) = K(80 - T0)

similarly,

in the second case when the temperature drops from 70C to 60C in 11min - 5min = 6 min

here, dT = 10C, dt = 6min = 360s

so,

-(10/360) = K(70 - T0)

dividing (1) by (2) we get

(80 - T0) / (70 - T0) = (10/300) x (360/10) = 6/5

solving further...

400 - 5T0 = 420 - 6T0

or surrounding temperature

T0 = 20C

and

now, after 15minutes

dt = 15 min = 900 s, dT = (80 - T)

T is the final temperature

so, Newtons Law of Cooling becomes

-(80-T) / 900 = K(80 - 20)

and we also have from 1st case

-10/300 = K(80 - 20)

equating the above two relations. we get

-(80-T) / 900 = -10/300

-24000 + 300T = -9000

thus, we have final temperature as

T = 45C

This question is part of UPSC exam. View all NEET courses

Most Upvoted Answer

A body cools down from 45degree C to 40degree C in 5 min and in anothe...

Answered by Sushil Kumar · View profile

Community Answer

A body cools down from 45degree C to 40degree C in 5 min and in anothe...

29degree C

Share via Whatsapp

Attention NEET Students!

To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.

Biology Class 11

Daily Test for NEET Preparation

NEET Mock Test Series 2025

Topic-wise MCQ Tests for NEET

View all answers Start learning for free

Explore Courses for NEET exam

Similar NEET Doubts

A body cools from 80degree to 64degree in 5 min the same body cools from 80 degree to 52 degree in 10 min what is the temperature of surrounding?

View answer

A block is moved from rest through a distance of 4m along a straight line path. The mass of the block is 5kg and the force acting on it is 20N. If the kinetic energy acquired by the block be 40J, at what angle to the path the force is acting- (

View answer

Incision given within hairline 45degree to zygoma is? a.gills temporal incisions b.alkymat bramly incision c.risdons incision d.moore's incision?

View answer

A carnot's engine with its cold body at 17degree C has 50 % efficiency. If the temperature of its hot body is now increased by 145 degree C the efficiency becomes?

View answer

Two vectors P and Q are of same magnitude and inclined at an angle 64 degree.The angle of vector P-Q with P is

View answer

Top Courses for NEETView all

Biology Class 11

Daily Test for NEET Preparation

NEET Mock Test Series 2025

Topic-wise MCQ Tests for NEET

Physics Class 11

Top Courses for NEET

View all

A body cools down from 45degree C to 40degree C in 5 min and in another 8 min. Find the tem. of the surrounding.?

Share with a Friend

Answer this doubt

Question Description
A body cools down from 45degree C to 40degree C in 5 min and in another 8 min. Find the tem. of the surrounding.? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A body cools down from 45degree C to 40degree C in 5 min and in another 8 min. Find the tem. of the surrounding.? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A body cools down from 45degree C to 40degree C in 5 min and in another 8 min. Find the tem. of the surrounding.?.

Solutions for A body cools down from 45degree C to 40degree C in 5 min and in another 8 min. Find the tem. of the surrounding.? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.

Here you can find the meaning of A body cools down from 45degree C to 40degree C in 5 min and in another 8 min. Find the tem. of the surrounding.? defined & explained in the simplest way possible. Besides giving the explanation of A body cools down from 45degree C to 40degree C in 5 min and in another 8 min. Find the tem. of the surrounding.?, a detailed solution for A body cools down from 45degree C to 40degree C in 5 min and in another 8 min. Find the tem. of the surrounding.? has been provided alongside types of A body cools down from 45degree C to 40degree C in 5 min and in another 8 min. Find the tem. of the surrounding.? theory, EduRev gives you an ample number of questions to practice A body cools down from 45degree C to 40degree C in 5 min and in another 8 min. Find the tem. of the surrounding.? tests, examples and also practice NEET tests.

Explore Courses for NEET exam