State and explain Newton's law of cooling.

Asked by Last Modified  

3 Answers

Learn Physics

Follow 2
Answer

Please enter your answer

Moumita Debnath

Tutor

Newton’s Law of Cooling states that the rate of temperature of the body is proportional to the difference between the temperature of the body and that of the surrounding medium. It is a reasonably accurate approximation in some circumstances. More precisely, let T denote the temperature of an object...
read more
Newton’s Law of Cooling states that the rate of temperature of the body is proportional to the difference between the temperature of the body and that of the surrounding medium. It is a reasonably accurate approximation in some circumstances. More precisely, let T denote the temperature of an object and Tο the ambient temperature. if t denotes time, then Newton's law states that dT/dt = -k(T-Tο) where k is a positive constant. Thus, if the object temperature is much higher than its surroundings, then T-Tο is large and positive, so dTdT/dt is large and negative, so the object cools quickly. If the object temperature is only slightly higher than its surroundings, then T-Tο is small positive, and the object cools slowly. So a cup of coffee will cool more quickly if you put it in the refrigerator! read less
Comments
Dislike Bookmark

Tutor

Newton’s Law of Cooling states that the rate of change of temperature of a body is proportional to the difference between the temperature of the body and that of the surrounding medium. It is a reasonably accurate approximation in some circumstances. More precisely, let T denote the temperature...
read more
Newton’s Law of Cooling states that the rate of change of temperature of a body is proportional to the difference between the temperature of the body and that of the surrounding medium. It is a reasonably accurate approximation in some circumstances. More precisely, let T denote the temperature of an object and Tο the ambient temperature. if t denotes time, then Newton's law states that dT/dt = -k(T-Tο) where k is a positive constant. Thus, if the object temperature is much higher than its surroundings, then T-Tο is large and positive, so dTdT/dt is large and negative, so the object cools quickly. If the object temperature is only slightly higher than its surroundings, then T-Tο is small positive, and the object cools slowly. So a cup of coffee will cool more quickly if you put it in the refrigerator! read less
Comments
Dislike Bookmark

Teacher

It states that rate of cooling of a body is proportional to the excess temperature of body over surroundings. dQ/dt= -K(T2-T1) where T1 is temperature of surroundings T2 is temperature of body. It is our observation that cloths get dry early when outside temperature is more than in winter. ...
read more
It states that rate of cooling of a body is proportional to the excess temperature of body over surroundings. dQ/dt= -K(T2-T1) where T1 is temperature of surroundings T2 is temperature of body. It is our observation that cloths get dry early when outside temperature is more than in winter. Heat lost by body is -msdT2 when temperature falls by small amount T2 in small time dt. m mass of body s is specific heat capacity.T2 is temp of body. Rate of loss of heat dQ/dt=msdT2/dt read less
Comments
Dislike Bookmark

View 1 more Answers

Related Questions

Sameer went on his bike from Delhi to Gurgaon at a speed of 60km/hr and came back at a speed of 40km/hr. What is his average speed for entire journey?
To find the average speed, you need to know the formula of average speed. The avg speed 0= 2 d / (t1+ t2) = 2 v1.v2/(V1 + V2). Just substitute the value.
Gowre

How to remember all formulas in physics 
Practice with patience is the key. "Karat karat abhyas k jadmati hote sujan.. rasri aawat jaat te sil per padat nishan".
Aady

What is the correct definition and formula of ohms law.? 
At a constant temperature, the potential difference across A conductor is directly proportional to the Current passing through it. V ∝I, V=IR. V/I=R
Ajay Singh
A lift is accelerated upward. Will the apparent weight of a person inside the lift increase, decrease or remain the same relative to its real weight? If the lift is going with uniform speed, then?
Thd apparent weight of the person will increase. When in uniform speed then acceleration is zero, so no change in weight.
Shubham
What is the unit of coefficient of friction?
The coefficient of friction is dimensionless (means it has no units) since it is a ratio of two similar quantities. Its purely a number
Mallikarjun
0 0
5

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Triangle law of vector addition

Rajan Mittal

0 0
0
Enter Learning Tip Content
R

Ratan Deshpande

0 0
0
Circular Motion
Uniform Circular Motion:-Circular motion is said to the uniform if the speed of the particle (along with the circular path) remains constant. Angular Displacement:- Scalar form:- ?S = r?θ Vector...

Shubham Tomar

0 0
0
The Universal Language of Scientific Measurement

Rakesh Nair

0 0
0
Law of Motion physics class 9 by sunil Sir
Law of motion Sir Isaac Newton was one of the greatest scientists and mathematicians that ever lived. He was born in England on December 25, 1643. He was born the same year that Galileo...

Sunil Yadav

0 0
0

Recommended Articles

The Trend of E-learning and it’s Benefits

E-learning is not just about delivering lessons online. It has a much broader scope that goes beyond manual paper or PowerPoint Presentations. To understand the reach of E-learning and how the whole process works in developing the Educational system, we will discuss a few points here. Let us find out how this new learning...

Read full article >

5 Engaging Activities For Children To Get...

Learning for every child starts from a very young age. While the formal methods include school curriculums and private lessons, the informal methods include dancing, music, drawing, and various fun-filling activities. Playing games and practising these types of activities helps the children get out of boredom and...

Read full article >

How To Choose The Right School For Children?

Quality education does not only help children to get a successful career and life, but it also hugely contributes to society. The formal education of every child starts from school. Although there are numerous schools, parents find it challenging to choose the right one that would fit their child. It is difficult for them...

Read full article >

6 Exam Hall Tips To Follow, For Every Good Student

Appearing for exams could be stressful for students. Even though they might have prepared well, they could suffer from anxiety, tension etc. These are not good for their health and mind. However, following a few exam preparation tips can save them from all these and help them to score good marks. Let’s find out all...

Read full article >

Find Grade 11 Tuition near you
Grade 11 Tuition in Delhi
Grade 11 Tuition in Bangalore
Grade 11 Tuition in Kolkata
Grade 11 Tuition in Hyderabad
Grade 11 Tuition in Mumbai
Grade 11 Tuition in Chennai
Grade 11 Tuition in Pune
Grade 11 Tuition in Gurgaon
Grade 11 Tuition in Noida
Grade 11 Tuition in Ghaziabad

Looking for Class 11 Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you