Physics Quiz - Forces in Liquids
1. Cohesion is the force of attraction between particles close to each other in:
A
the same substance
B
substances that dissolve in water
C
different substances
2. Adhesion is the force of attraction between particles close to each other in:
A
different substances
B
the same substance
C
substances that dissolve in water
3. Cohesive forces cause:
A
the attraction between water and its container
B
the round shape of water droplets
C
the cleaning action of detergents in water
4. Surface tension is:
A
the attraction at the surface of water only
B
cohesion at the surface of liquids
C
unaffected by soaps
5. To overcome the problem of surface tension in a diving pool, a person may:
A
dive with clasped pointed hands
B
do a belly flop dive
C
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 droplet
B
smaller will be its droplet
C
less spherical will be the droplet
7. Surface tension in a diving pool can be reduced by:
A
addition of detergents
B
fountains in the water
C
both of the above
8. Oil droplets are:
A
smaller than water droplets
B
the same diameter as water droplets
C
larger than water droplets
9. The rounded shape of the surface of a liquid in its container is called the:
A
surface tension
B
cohesion
C
meniscus
10. The meniscus of a liquid is the result of the adhesive attraction between the particles of:
A
the liquid and the container
B
the water and its contents
C
the 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:
A
the same in all three tubes
B
highest in the thinnest tube
C
highest in the thickest tube
12. The movement of water from the tree roots up to the leaves is by:
A
capillary action
B
surface tension
C
precipitation
13. Flower growers use the concept of capillary action when they:
A
place cut flowers in dyed water to colour the petals
B
add extra minerals to the soil to increase respiration
C
adjust 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:
A
is straight
B
curves in an upright U-shape
C
curves in an upside down U-shape
15. When using a measuring cylinder with water, one should read the:
A
middle of the meniscus
B
bottom of the meniscus
C
top of the meniscus
Your Answers
Q 1:
Q 2:
Q 3:
Q 4:
Q 5:
Q 6:
Q 7:
Q 8:
Q 9:
Q10:
Q11:
Q12:
Q13:
Q14:
Q15:
Correct Answers
Q 1:
Q 2:
Q 3:
Q 4:
Q 5:
Q 6:
Q 7:
Q 8:
Q 9:
Q10:
Q11:
Q12:
Q13:
Q14:
Q15: