Problem

Calculate the numerical value of each of the dimensionless parameters listed in the table....

Calculate the numerical value of each of the dimensionless parameters listed in the table. Be sure to check that the ratio is actually dimensionless after you insert the values.

	Situation	Name	Expression	Value
(a)	Hot water	Prandtl number, Pr
(b)	Sphere in air	Drag coefficient, CD
(c)	Water in a river	Froude number, Fr

Properties and definitions for this problem:

Property	Symbol	Units	Air	Water
Density	ρ	slugs/ft3	0.002378	1.94
Dynamic viscosity	µ	kg/(m s)	2 × 10–5	4 × 10–4
Thermal conductivity	k	W/(m K)	0.025	0.7
Specific heat	Cp	cal/(g °C)	0.24	1

Property	Symbol	Units	Value
Silhouette Area of object	A	in2	120
Water depth	H	m	3
Water speed	vw	cm/s	210
Air speed	va	mph	60
Drag Force on sphere	F	N	30

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