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प्रश्न
A plastic cube is released into the water. Will it sink or come to the surface of the water?
उत्तर
- 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.
संबंधित प्रश्न
What is the scientific name of the 'upward force' acting on an object immersed in a liquid?
Fill in the blank with suitable word :
It is the................. force which makes objects appear lighter in water.
If a fresh egg is put into a beaker filled with water, it sinks. On dissolving a lot of salt in the water, the egg begins to rise and then floats. Why ?
The density of brass is 8.4 g cm-3. What do you mean by this statement?
Explain the following statement:
It is easier to cut with a sharp knife than with a blunt one.
What do you understand by the term upthrust of a fluid? Describe an experiment to show its existence.
What is the cause of upthrust? At which point can it be considered to act?
Will a body weigh more in air or vacuum when weighed with a spring balance? Give a reason for your answer.
Two identical pieces, one of ice (density = 900kg per meter cube) and other wood (density = 300kg per meter cube) float on water.
- Which of the two will have more volume submerged inside water
- Which of two will experience more upthrust due to water.
A beaker contains a liquid of density ‘ρ’ up to height ‘h’ such that ‘PA’ is atmospheric pressure and ‘g’ is the acceleration due to gravity. Answer the following questions:
- What is the pressure on the free surface of the liquid?
- What is the pressure on the base of the beaker?
- What is the lateral pressure at the base on the inner walls of the beaker?
