Question

At 20 degrees celsius to attain the terminal velocity how fast will an aluminium sphere of radius 1 mm fall through water issue flow to be laminar flow and specific gravity

Answer 1

Use this formula and solve urself

Answer 2

Hey dear,

Some data is missing. I added it to given section.

◆ Answer-

v = 4.628 m/s

◆ Explanation-

# Given-

ρ = 1000 kg/m^3

ρ' = 2700 kg/m^3

r = 1 mm = 10^-3 m

η = 8×10^-4

# Solution-

Terminal velocity of the aluminium sphere is given by -

v = 2(ρ'-ρ)gr^2 / 9η

v = 2 × (2700-1000) × 9.8 × (10^-3)^2 / (9×8×10^-4)

v = 4.628 m/s

Terminal velocity of aluminium sphere is 4.628 m/s.

Hope this helps...