3
to increase voltage, current or power of an input signal
60 gm
Let's denote the amount of sugar to be added as "x" in grams.
Initially, the sugar solution has a total weight of 300 grams, and 40% of it is sugar. This means that the amount of sugar in the solution is:
40% of 300 g = 0.4 x 300 g = 120 g
After adding "x" grams of sugar, the total weight of the solution will be 300 + x grams. The amount of sugar in the solution will also increase to 120 + x grams.
To make a 50% sugar solution, we need to have:
(120 + x) / (300 + x) = 0.5
Solving for "x", we get:
120 + x = 0.5 * (300 + x) 120 + x = 150 + 0.5x 0.5x = 30 x = 60
Therefore, 60 grams of sugar should be added to the solution to make it a 50% sugar solution.
Reynold's number
The important dimensionless numbers in fluid mechanics are
1. Reynold’s number
2. Froude’s number
3. Weber’s number
4. Euler’s number
5. Mach’s number or Cauchy’s number
Reynold’s number: Reynold’s number is the ratio of inertia force to the viscous force.
Froude’s number: Froude’s number is the ratio of inertia force to the gravity force.
Weber’s number: Weber’s number is the ratio of inertia force to the surface tension force.
Euler’s number: Euler’s number is the ratio of inertia force to the pressure force.
Mach’s number or Cauchy’s number: Mach’s number or Cauchy’s number is the ratio of inertia force to the elastic force.