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प्रश्न
Select the correct option:
When an object sinks in a liquid, its:
पर्याय
buoyant force is more than the weight of object
buoyant force is less than the weight of an object
buoyant force is equal to the weight of the object
none of the above
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उत्तर
buoyant force is less than the weight of object
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संबंधित प्रश्न
What is upthrust ?
When a boat is partially immersed in water, it displaces 600 kg of water. How much is the buoyant force acting on the boat in newtons ? (g = 10 m s-2)
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.
Ans the following:
Will a piece of iron float or sink in water?
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?
Differentiate between thrust and pressure.
How does the pressure exerted by a solid and fluid differ?
The diagram below in Fig. 4.12 shows a device which makes the use of the principle of transmission of pressure.
- Name the parts labelled by the letters X and Y.
- Describe what happens to valves A and B and to the quantity of water in the two cylinders when the lever arm is moved down.
- Give reasons for what happens to valves A and B in part (ii).
- What happens when the release valve is opened?
- What happens to valve B in cylinder P when the lever arm is moved up?
- Give a reason for your answer in part (v).
- State one use of the above device.
A vessel contains water up to a height of 1.5 m. Taking the density of water 103 kg m-3, acceleration due to gravity 9.8 m s-2 and area of base of vessel 100 cm2, calculate: (a) the pressure and (b) the thrust at the base of vessel.
The magnitude of buoyant force acting on an object immersed in a liquid depends on ______ of the liquid.
The point at which the force of buoyancy is supposed to act is known as ______.
