Question

The density of liquid gallium at 30'C is 6.095 g/ml Because of its wide liquid range (30 to 2400°C). gallium
could be used as a barometer fluid at high temperature ?
. What height (in cm) of gallium will be supported on a day when the mercury barometer reads 740 torr ?
(The density of mercury is 13.6 g/mL)
a) 322
b) 285
c) 165
d) 210​

Answer 1

Answer:

165 cm

Explanation:

Given The density of liquid gallium at 30'C is 6.095 g/ml Because of its wide liquid range (30 to 2400°C). gallium

could be used as a barometer fluid at high temperature ?

. What height (in cm) of gallium will be supported on a day when the mercury barometer reads 740 torr ?

Now we need to find the height .

We know that  

P = density x g x h

  = ρ g h

We know that 1 torr = 133.322 pa

          740 torr = 98,658.28 pa

98,658.38 = 6095 kg/m^3 x 9.8 m/s^2 x h

h = 1.65 m

h = 165 cm

Answer 2

Answer:

c)165cm

Explanation:

P=d×g×h

therefore,740/760atm=6.0×10^-6×10×h

...................0.97=60×10^-4×h

...…...….......9700/60=h

.... h=165