Answer:
The diameter of the test cylinder should be 7.65 meters.
Explanation:
The Hooke's law relation between stress and strain is mathematically represented as
Where 'E' is modulus of elasticity of the material
Now by definition of strain we have
Applying values to obtain strain we get
Thus the stress developed in the material equals
Now by definition of stress we have
Solving for 'D' we get
Answer:
The velocities in points A and B are 1.9 and 7.63 m/s respectively. The Pressure at point B is 28 Kpa.
Explanation:
Assuming the fluid to be incompressible we can apply for the continuity equation for fluids:
Where A, V and Q are the areas, velocities and volume rate respectively. For section A and B the areas are:
Using the volume rate:
Assuming no losses, the energy equation for fluids can be written as:
Here P, V, p, z and g represent the pressure, velocities, height and gravity acceleration. Considering the zero height level at point A and solving for Pb:
Knowing the manometric pressure in point A of 70kPa, the height at point B of 1.5 meters, the density of water of 1000 kg/m^3 and the velocities calculated, the pressure at B results: