The height of mercury which exerts the same pressure as 20 cm of water column, is_____

1.47 cm

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14.8 cm

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148 cm

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none of these

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Solution

The correct option is A 1.47 cm
$d e n s i t y \times a r e a \times h = c o n s t a n t$
$S w a t e r \times a r e a \times h w a t e r = S m e r c u r y \times a r e a \times h m e r c u r y$
$1 9 / c c \times 20 c m = 13.56 9 / c c \times h$
$h = \frac{20}{13.56} c m = 1.47 c m$
$h = 1.47 c m$

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The height of mercury which exerts the same pressure as 20 cm of water column, is_____

The correct option is A 1.47 cmdensity×area×h=constantSwater×area×hwater=Smercury×area×hmercury19/cc×20cm=13.569/cc×hh=2013.56cm=1.47cmh=1.47cm

The correct option is A 1.47 cm
$d e n s i t y \times a r e a \times h = c o n s t a n t$
$S w a t e r \times a r e a \times h w a t e r = S m e r c u r y \times a r e a \times h m e r c u r y$
$1 9 / c c \times 20 c m = 13.56 9 / c c \times h$
$h = \frac{20}{13.56} c m = 1.47 c m$
$h = 1.47 c m$