Luids of viscosities 1  =0.1 n. s/ms and 2  =0.15 n. s/m2 are contained between two plates (each plate 1
m2 area). the thicknesses are h1=.5 mm and h2=0.3 mm, respectively. find the force f to make the upper
plate move at a speed of 1 m/s. what is the fluid velocity at the interface between the two fluids?

a) 1 / 3 N

b) 5/3 m/s

Explanation:

For constant speed V at the interface of the two fluids the net force is zero.

Hence, F top = F bottom thus the shear stresses at top and bottom must be the same.

For force of top plate

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only

answer:

c

explanation: