Question

If the metal block of a metal area 15m² gets heated and raise the temperature by 5k changes to 5k changes to 20m².Find the coefficient of superficial expansion

1.0.0667
2.0.667
3.6.67
4.66.7
Kindly answer correctly​

Answer 1

Answer-

Let the volume expansion be γ  

Let the area expansion be β

Let the linear expansion be α

Now we know that γ=3α  

                               β=2α

Also change in volume will be directly proportional to γ=3α  

And change in radius will be proportional to α

So maximum percentage change will occur in volume and least in radius.

Explanation:

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Answer 2

Answer:

Let the volume expansion be γ

Let the area expansion be β

Let the linear expansion be α

Now we know that γ=3α

β=2α

Also change in volume will be directly proportional to γ=3α

And change in radius will be proportional to α

So maximum percentage change will occur in volume and least in radius.