Question

The height of mercury column in a simple barometer is h as the tube is inclined

Answer 1

Answer: l = h/cos(alpha)

Explanation:

Let vertical angle be (alpha).

Then, cos(x) = Base/Hypotenuse

So here we have (alpha) as x, h as base and l as hypotenuse.

Now putting these values

We got

l = h/cos(alpha)

Answer 2

Answer: l = h/cos(alpha)

the height of mercury in a glass tube will remain the same irrespective of the angle of tilt, this is a real concept.

but  the length along the tube changes and it is l

    sin(alpha)= l/h

   l= h sin(alpha)

Explanation:

Let vertical angle be (alpha).

Then, cos(x) = Base/Hypotenuse

So here we have (alpha) as x, h as base and l as hypotenuse.

Now putting these values

We got

l = h/cos(alpha)

We got

l = h/cos(alpha)