18 Questions
What is the definition of surface tension?
The tensile force acting on the surface of a liquid in contact with a gas
What is the unit of measurement for surface tension in SI units?
N/m
Why do molecules near the free surface of a liquid experience unbalanced forces?
Because of the upward and downward forces acting on them
How do molecules located at the free surface of a liquid behave?
Experience downward forces
What is the phenomenon that explains the liquid's free surface acting as an elastic membrane under tension?
Surface tension
In what direction do all molecules on the free surface of a liquid experience a force?
Downward
What is the phenomenon of the rise or fall of a liquid surface in a small tube relative to the adjacent general level of liquid called?
Capillarity
In the equilibrium of a semi jet, which formula represents the force due to surface tension?
$\sigma \times 2L$
If the surface tension of water is 0.0725 N/m and the pressure inside a droplet of water is 0.02 N/cm² greater than the outside pressure, what is the diameter of the droplet?
1 mm
What happens when a liquid surface rises in a small tube held vertically in the liquid?
Capillary rise
In the context of liquid jet forces, what is equated to calculate the pressure inside the liquid jet?
$p = \frac{\sigma \times 2L}{L \times d}$
If the pressure outside a water droplet of diameter 0.04 m is 10.32 N/cm² and the surface tension is 0.0725 N/m, what is the pressure within the droplet?
$9.6 N/cm²$
What causes the pressure intensity inside a liquid droplet to increase as its diameter decreases?
Increase in tensile force due to surface tension
What is the primary force acting on a hollow bubble like a soap bubble?
Tensile force due to surface tension
What happens to the pressure intensity inside a liquid jet as its length increases?
Pressure intensity decreases
What is the condition for equilibrium in a liquid droplet cut into two halves?
Tensile force due to surface tension and pressure force are equal in magnitude and opposite in direction
What is the main factor affecting capillarity?
Surface tension of the liquid
What is the relationship between surface tension and the pressure difference across a curved surface?
They are directly proportional
This quiz examines the concept of surface tension on a liquid droplet, considering variables such as radius, surface tension, pressure intensity, and diameter. Learn how surface tension affects the behavior of small spherical droplets in different conditions.
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