## Viscosity

Fluid, both liquid and gas substances of different types have different viscosity levels. Viscosity is a friction between the molecules that make up a fluid. So the molecules make up fluid friction when the fluid flows. In liquids, the...

## Capillarity

Force of Cohesion and Adhesion Cohesion force is an attraction force between molecules in a similar substance, while an attraction force between molecules of an unequal substance is called the Adhesion Force. For example, we pour water into a...

## Surface tension

Have you ever played soap bubbles? Soap bubble round. Funny. Can be blown. After flying, soap bubbles burst. Wow, it’s fun, a childhood game. Why is soap bubble round? Please wake up in the morning, then notice the leaves...

## Archimedes’ principle

A ship with a huge mass does not sink, while a stone that has a small size can sink. Why is that? The answer is straightforward if you understand the concept of buoyancy and Archimedes’ principle. In everyday life,...

## Pascal’s principle

How is the working principle of a hydraulic lift used to lift a car? What is the working principle of hydraulic brakes when used to reduce the car’s speed? Please learn Pascal’s Principle to understand this. Every fluid is...

## Pressure in fluids

In physics, the pressure is defined as force per unit area, where the direction of the force is perpendicular to the surface area. Mathematically, pressure is expressed by the equation P = F / A, where P = pressure,...

## Density and specific gravity

Density One important characteristic of a substance is density. Density is the ratio of mass to volume. Mathematically written: ρ = m / V ρ (rho) is a Greek letter commonly used to express density, m is mass and...

## The applications of Bernoulli’s principle and Bernoulli’s equation

Torricelli’s theorem One of the uses of Bernoulli’s equation is to calculate the speed of a liquid exit from the bottom of a container (see figure). We apply Bernoulli’s equation at point 1 (surface of the container) and point...

## Bernoulli’s principle and Bernoulli’s equation

When we ride a motorcycle, the clothes we use are swollen backward. Sometimes if the wind blows hard, the door can close itself. Though the wind blows outside the house, while the door is inside the house. This can...

## Equation of continuity

Try to open the water tap slowly while paying attention to the speed of the water coming out of the mouth of the faucet. Now compare, where is the rate of water flow faster, when the mouth of the...