Advertisements
Advertisements
Question
A plastic cube is released into the water. Will it sink or come to the surface of the water?
Advertisements
Solution
- When dropped into water, the plastic cube floats on the top rather than sinking. The term "buoyancy phenomenon" refers to this.
- When compared to other objects, plastic has a high rate of buoyancy and is water-repellent. Plastic naturally floats on the water's surface because it is lighter than water.
- The same experiment will result in a glass cube sinking because it weighs more than the liquid it is released into.
RELATED QUESTIONS
Why do we feel light on our feet when standing in a swimming pool with water up to our armpits ?
A cork piece floats on water surface while an iron nail sinks in it. Explain the reason.
The density of water is 1.0 g Cm-3. The density of iron is 7.8 × 10″3 g Cm-3. The density of mercury is 13.6 g Cm-3.
Answer the following:
Will a piece of iron float or sink in mercury?
Why does a piece of ice float on water?
Why does it happen?
A ship dips to a larger depth in fresh water as compared to marine water.
Complete the following sentence :
Pressure at a depth h in a liquid of density p is ......................
- Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g cm-3.
- Will the height of the water column in part (a) change if the cross-section of the water column is made wider?
The mass of a block made of certain material is 13.5 kg and its volume is 15 × 10-3 m3.
(a) Calculate upthrust on the block if it is held fully immersed in water.
(b) Will the block float or sink in water when released? Give a reason for your answer.
(c) What will be the upthrust on block while floating?
Take density of water = 1000 kg m-3.
Complete the following sentence.
Mass = .................... × density
Complete the analogy.
Downward force : Weight :: Upward force offered by liquid : ______
