The concentric cylinder viscometer shown in Fig. P1.88 has a cylinder height of \(10.0 \mathrm{~cm}\), a cylinder radius of \(3.0 \mathrm{~cm}\), and a uniform gap between the cylinder and the container (bottom and sides) of \(0.10 \mathrm{~cm}\). The pulley has a radius of \(3.0 \mathrm{~cm}\). Determine the weight required to produce a constant rotational speed of \(30 \mathrm{rpm}\) if the gap is filled with:

(a) water,

(b) gasoline,

(c) glycerin.

Figure P1.88

Transcribed Image Text:

H = 10.0 cm 0.10 cm 3.0 cm W 0.10 cm R = 3.0 cm