Physics Mechanical Properties of Fluids
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New answer posted
a month agoContributor-Level 10
ρvg - mg = ma
⇒ pvg/m = g + a
⇒ m = pvg / (g + a)
⇒ 10³ (4/3 π * 10? ) (9.8) / 9.898
⇒ 4.15gm
New answer posted
a month agoContributor-Level 10
The height of capillary rise is given by the formula:
h = (2T cosθ) / (rρg)
Given: h = 15 cm = 0.15 m, r = 0.015 cm = 1.5 * 10? m, ρ = 900 kg/m ³, g = 10 m/s², and θ ≈ 0° (so cosθ ≈ 1).
We need to find the surface tension, T.
T = (h r ρ g) / (2 cosθ)
T = (0.15 * 1.5 * 10? * 900 * 10) / 2
T = 0.10125 N/m
The answer is required in milliNewton m? ¹, so we multiply by 1000.
T = 101.25 mN/m.
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