For the laminar flow of water of viscosity 0.0012 `Nsm^(-2)` through a tube of diameter 0.8 cm, calculate the critical velocity of water.

Explanation

To calculate the critical velocity of water in laminar flow through a tube, we can follow these steps:

### Step 1: Understand the Reynolds Number
The Reynolds number (Re) is a dimensionless quantity used to predict flow patterns in different fluid flow situations. For laminar flow, Re is less than 2000. The critical velocity is determined when Re is equal to 2000.

### Step 2: Write the Formula for Reynolds Number
The formula for Reynolds number is given by:

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