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Related Concept Videos

Frost Action on Concrete01:27

Frost Action on Concrete

Concrete structures in cold climates, such as those along roadsides, can retain moisture. This moisture makes them susceptible to frost-related damage when temperatures fall below freezing. Adding moisture worsens the damage during temperature fluctuations, leading to repeated freezing and thawing. De-icing salts, spread over these structures to melt ice, add to the freeze-thaw cycle, and draw even more moisture into the concrete.
This freeze-thaw cycle primarily causes surface scaling, where...
Phase Transitions: Vaporization and Condensation02:39

Phase Transitions: Vaporization and Condensation

The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules...
Freezing Point Depression and Boiling Point Elevation03:12

Freezing Point Depression and Boiling Point Elevation

Boiling Point Elevation
The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. Since the vapor pressure of a solution is lowered due to the presence of nonvolatile solutes, it stands to reason that the solution’s boiling point will subsequently be increased. Vapor pressure increases with temperature, and so a solution will require a higher temperature than will pure solvent to achieve any given vapor pressure, including one...
Freezing Point Depression and Boiling Point Elevation01:24

Freezing Point Depression and Boiling Point Elevation

When a non-volatile solute is added to a pure solvent, it results in the lowering of the freezing point of the solvent. This phenomenon is called freezing point depression. The extent to which the freezing point is lowered depends on the molality of the solute -the number of moles of solute per kilogram of solvent and the cryoscopic constant of the solvent.From the plot of chemical potential, μ, against temperature, it is evident that the μ of both solid and liquid solvents decrease with...
Frost Circles for Different Conjugated Systems01:18

Frost Circles for Different Conjugated Systems

The inscribed polygon method is consistent with Hückel’s 4n + 2 rule and helps to learn whether the given cyclic compound is aromatic or not. The compound is stable and aromatic if every bonding molecular orbital (MO) is completely filled with a pair of electrons. However, if the non-bonding or antibonding orbitals are filled with electrons, the compound is unstable and not aromatic. Consider the Frost circle diagrams for cycloalkenes containing 4 to 8 carbons.
The Colloidal State01:29

The Colloidal State

The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called the...

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Related Experiment Video

Updated: May 16, 2026

Safe Experimentation in Optical Levitation of Charged Droplets Using Remote Labs
09:09

Safe Experimentation in Optical Levitation of Charged Droplets Using Remote Labs

Published on: January 10, 2019

Leidenfrost levitation: beyond droplets.

Ali Hashmi1, Yuhao Xu, Benjamin Coder

  • 1Mechanical Engineering, Washington State University, Vancouver, Washington 98686, USA.

Scientific Reports
|November 15, 2012
PubMed
Summary
This summary is machine-generated.

Researchers levitated a small cart using the Leidenfrost effect, enabling frictionless movement and load-carrying capabilities. This innovation could revolutionize mechanical systems by eliminating friction.

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Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
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Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method

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Last Updated: May 16, 2026

Safe Experimentation in Optical Levitation of Charged Droplets Using Remote Labs
09:09

Safe Experimentation in Optical Levitation of Charged Droplets Using Remote Labs

Published on: January 10, 2019

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
07:18

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method

Published on: June 14, 2019

Area of Science:

  • Physics
  • Mechanical Engineering
  • Materials Science

Background:

  • Friction significantly hinders the efficiency of mechanical systems.
  • The Leidenfrost effect demonstrates liquid droplet levitation on a hot surface via vapor.
  • This phenomenon has potential applications beyond droplet behavior.

Purpose of the Study:

  • To investigate the feasibility of levitating a small cart using the Leidenfrost effect.
  • To explore the load-carrying capacity and frictionless motion of a levitated cart.
  • To assess propulsion methods and water consumption for a levitated cart system.

Main Methods:

  • Experimental setup involving a heated surface and a small cart.
  • Systematic testing of load capacity across various surface temperatures.
  • Observation and analysis of cart propulsion on slanted and ratchet-shaped surfaces.
  • Measurement of water consumption rates for sustained levitation.

Main Results:

  • Successful levitation of a small cart was achieved using Leidenfrost vapor.
  • The levitated cart demonstrated frictionless movement and could support a load.
  • Load capacity was quantified in relation to surface temperature.
  • Propulsion via gravity and self-propulsion on a ratchet surface were demonstrated.
  • Experimental water consumption rates were compared with theoretical predictions.

Conclusions:

  • The Leidenfrost effect can be harnessed to levitate a macroscopic object like a cart, enabling frictionless motion.
  • This technology holds promise for applications in engineering where friction is a limiting factor.
  • Further development could lead to practical frictionless transport systems.