Awater tunnel has a circular cross-section with a radius of 1.8 m in its main section. in a test section of the tunnel the radius constricts to a value of 0.60 m. if the speed of water flow is 3.0 m/s in the main section, determine the speed of water flow in the test section.

To solve this problem it is necessary to apply the concepts related to the concepts to continuity.

From the continuity equation we know that

Where,

A = Cross-sectional Area

V = Velocity

In a circle the area is given by

Therefore replacing with our values we have that

While the area two is defined as

Applying the continuity equation we have to

Therefore the speed of water flow in the test section is 27.28m/s

mass and volume are the answers you are looking for

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.