13. How much water will flow in one minute through 200mm of a tube 1.5mm in diameter if the pressure across the tube is 10 cmHg

The volumetric flow rate is 0.00589 cm³ /s

Explanation:

Given;

length of the tube, L = 200 mm = 20 cm

diameter of the tube, 1.5 mm

radius of the tube, r = 0.75 mm = 0.075 cm

Area of the tube is given by;

A = πr²

A = π(0.075)² = 0.0177 cm²

Velocity of water through the tube is given is by;

v =  L / t

v = 20 cm / 60 s

v = 0.333 cm / s

Volumetric flow rate of water is given by;

Q = Av

Q = (0.0177 cm²)(0.333 cm / s)

Q = 0.00589 cm³ /s

Therefore, the volumetric flow rate is 0.00589 cm³ /s

does anyone know or what?

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.