Question

1) A mercury barometer has a radius of 7 mm. The density of the mercury is 13.6 g/cm^3, the superficial tension of the mercury is 465 dyn/cm and the angle between the mercury and the glass of the vertical tube that contains it is 140°. What is the height of the level of the mercury in the glass tube?

2) A bar made of steel is 1 m long and has a radius of 5 cm. If the bar is thrown into the ocean at a depth of 4500 m, what is the change in its volume? (The bulk modulus of steel is 1.6*10^11 N/m^2).

Thanks in advance!

Answer 1