Question

Calculate the height of water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g cm cube

Answer 1

Pressure at the place remains the same for both water and mercury.

Pressure exerted by mercury = density of mercury * height of mercury column * g (acc. due to gravity)

=> Pressure exerted by mercury = 13.6 * 70 * g
=> Pressure exerted by mercury = 952 g.

Pressure exerted by water = density of water * height of water column * g (acc. due to gravity)

=> Pressure exerted by water = 1 * h *g
=> Pressure exerted by water = h g.

Now, According to question,

952* g = h* g
=> h = 952 cm.

Therefore, the height of water column which will exert on its base the same pressure as the 70 cm column of mercury is 952 cm. (Answer)

Answer 2

Answer:

Pressure at place remains the same for both water and mercury.

Pressure exerted by mercury=13.6*70*g

Pressure exerted by mercury=952g

Pressure exerted by water=1*h*g

Pressure exerted by water=hg

Now, According to question

952*g=h*g

Therefore, the height of water column which will exert on its base the same pressure as the 70cmcolumn of mercury