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3 years ago

Identify the correct statements in the context of friction factors of laminar and turbulent flows

Engineering

1 answer:

soldi70 [24.7K]3 years ago

5 0

Answer:

a) In turbulent flow, the tubes with rough surfaces have much higher friction factors than the tubes with smooth surfaces.

Explanation:

Turbulent flow is a type of fluid flow in which fluid will undergo irregular fluctuations. The tubes with rough surfaces have higher friction factors than the tubes with smooth surfaces. In laminar flow the effect of effect of surface roughness is negligible on friction factors.

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4 years ago

Lithium at 20°C is BCC and has a lattice constant of 0.35092 nm. Calculate a value for the atomic radius of a lithium atom in na

Nutka1998 [239]

Answer:

the atomic radius of a lithium atom is 0.152 nm

Explanation:

Given data in question

structure = BCC

lattice constant (a) = 0.35092 nm

to find out

atomic radius of a lithium atom

solution

we know structure is BCC

for BCC radius formula is $\sqrt{3}$ /4 × a

here we have known a value so we put a in radius formula

radius = $\sqrt{3}$ /4 × a

radius = $\sqrt{3}$ /4 × 0.35092

radius = 0.152 nm

so the atomic radius of a lithium atom is 0.152 nm

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3 years ago