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प्रश्न
The density of brass is 8.4 g cm-3. What do you mean by this statement?
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उत्तर
This statement means one cubic centimetre volume of brass has mass of 8.4 g.
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संबंधित प्रश्न
What causes buoyant force (or upthrust) on a boat ?
A body experiences the same buoyant force while floating in water or alcohol.
A body floats in a liquid when its weight becomes equal to the weight of the liquid displaced by its submerged part.
Differentiate between thrust and pressure.
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.
Complete the following sentence :
Pressure at all points at the same depth is ....................
Describe an experiment to show that a body immersed in a liquid appears lighter than it really is.
The point at which the force of buoyancy is supposed to act is known as ______.
If the buoyant force is less, the object will float.
