Physics Quiz - Forces in Liquids
 1. Cohesion is the force of attraction between particles close to each other in:A the same substanceB substances that dissolve in waterC different substances 2. Adhesion is the force of attraction between particles close to each other in:A different substancesB the same substanceC substances that dissolve in water 3. Cohesive forces cause:A the attraction between water and its containerB the round shape of water dropletsC the cleaning action of detergents in water 4. Surface tension is:A the attraction at the surface of water onlyB cohesion at the surface of liquidsC unaffected by soaps 5. To overcome the problem of surface tension in a diving pool, a person may:A dive with clasped pointed handsB do a belly flop diveC dive with hands flat and at right angles to the surface of the water 6. The greater the cohesive forces of a liquid, the:A larger will be its dropletB smaller will be its dropletC less spherical will be the droplet 7. Surface tension in a diving pool can be reduced by:A addition of detergentsB fountains in the waterC both of the above 8. Oil droplets are:A smaller than water dropletsB the same diameter as water dropletsC larger than water droplets 9. The rounded shape of the surface of a liquid in its container is called the:Asurface tensionBcohesionCmeniscus 10. The meniscus of a liquid is the result of the adhesive attraction between the particles of: Athe liquid and the container Bthe water and its contents Cthe liquid and any dissolved particles 11. If three thin open tubes with different diameters were stood upright in a container of water, the water level would be: Athe same in all three tubes Bhighest in the thinnest tube Chighest in the thickest tube 12. The movement of water from the tree roots up to the leaves is by: Acapillary action Bsurface tension Cprecipitation 13. Flower growers use the concept of capillary action when they: Aplace cut flowers in dyed water to colour the petals Badd extra minerals to the soil to increase respiration Cadjust the lengths of daylight in greenhouses to stimulate flowering and fruiting 14. The meniscus of mercury is different to that of water in that it: Ais straight Bcurves in an upright U-shape Ccurves in an upside down U-shape 15. When using a measuring cylinder with water, one should read the: Amiddle of the meniscus Bbottom of the meniscus Ctop of the meniscus

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