Question

How to check the correctness of Y=MgL
πr^2l

Answer 1

Answer:

Explanation:

Answer:  

To check the dimensional correctness of a given physical relation, we should check whether the dimensions on both sides of each term is the same or not, if not the equation is dimensionally incorrect; if the dimensions on both sides of each term of the give equation are same the given equation is dimensionally correct.

 

Example:

To check the correctness of v = u + at, using dimensions

Dimensional formula of final velocity v = [LT-1]

Dimensional formula of initial velocity u = [LT-1]

Dimensional formula of acceleration x time, at = [LT-2 x T]

= [LT-1]

Answer 2

Answer:

y[m]^1  * [l]^-1  * [t]^-2= n *[m]^1 *  [l]^-1  *  [t]^-2

here y is young modulus and n is any natural no.

Explanation:

1) first convert these formula into dimension

2.)write dimension on both sides.

3.)then check if they are same if they are yes it is accurate

CONCLUSION YES THEY ARE ACCURATE!!

HOPE IT HELPS!!