The maximum stress in a section of a circular tube subject to a torque is τmax = 27 MPa . If the inner diameter is Di = 3.75 cm and the outer diameter is Do = 5.25 cm , what is the torque on the section?

Explanation:

The shear stress due to torque can be calculed by using the following model:

The maximum torque on the section is:

The Torsion Constant for the circular tube is:

Now, the require output is computed:

b) 10 minutes

girls stopped for 10 minutes.

3.2x10^7