The oil rises in the lamp wick due to capillary phenomenon. The wick’s fibers act as tiny tubes, creating capillary action. This action draws the oil upwards against gravity, allowing it to reach the flame, where it vaporizes and burns. ...
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When two capillaries of different diameters are immersed vertically in a liquid, the height of the rising liquid will be higher in the smaller diameter capillary. This phenomenon is governed by the capillary action, where the height of liquid rise ...
The unit of viscosity is Poise. Viscosity measures a fluid’s resistance to flow. It is defined as the ratio of shear stress to shear rate within a fluid. The Poise is the unit used to quantify viscosity, named after French ...
If the diameter of the capillary is doubled, the height of the water surface rising in it remains the same. This is because the height to which a liquid rises in a capillary tube is inversely proportional to the diameter ...
Astronauts cannot stand straight in space because there is no gravity. In the absence of gravitational pull, there is no force to hold them upright. Instead, they experience microgravity, causing them to float and requiring them to use restraints or ...
Ventilators are installed near the ceiling of the room because the exhaled hot air rises up and goes out. Hot air, being less dense, naturally ascends towards the ceiling. Placing ventilators there allows for the efficient removal of this hot ...
When soap is dissolved in water, the surface tension decreases. Soap molecules contain both hydrophilic and hydrophobic parts. The hydrophobic tails disrupt the cohesive forces between water molecules at the surface, reducing surface tension.
When detergent is added to pure water, the surface tension decreases. Detergent molecules disrupt the cohesive forces between water molecules at the surface, reducing the surface tension. This allows the detergent solution to spread more easily and penetrate surfaces, enhancing ...
A person at rest in the middle of a horizontal plane of perfectly smooth ice can bring themselves to the shore by using the first law of motion. This law states that an object at rest will remain at rest ...
Since the car maintains a constant velocity, there’s no additional force acting on the ball while it’s airborne. Therefore, the ball travels vertically upward after being thrown and then falls straight back down relative to the car’s frame of reference. ...