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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 8

What is the unit of relative density? - Physics

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प्रश्न

What is the unit of relative density?

व्याख्या
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उत्तर

UNIT OF RELATIVE DENSITY: No units since it is a pure ratio.

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पाठ 2: Physical Quantities and Measurement - Short/Long Answer Questions [पृष्ठ ३५]

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सेलिना Concise Physics [English] Class 8 ICSE
पाठ 2 Physical Quantities and Measurement
Short/Long Answer Questions | Q 11 | पृष्ठ ३५

संबंधित प्रश्‍न

What is upthrust  ?


Why do we feel light on our feet when standing in a swimming pool with water up to our armpits ?


A body X sinks in water, but a body Y floats on water. The density of the body X is ......... than the density of body Y.


Name the S.I. unit of density. How is it related to g Cm-3?


A plastic cube is released into the water. Will it sink or come to the surface of the water? 


The diagram below in Fig. 4.12 shows a device which makes the use of the principle of transmission of pressure.

  1. Name the parts labelled by the letters X and Y.
  2. 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.
  3. Give reasons for what happens to valves A and B in part (ii).
  4. What happens when the release valve is opened?
  5. What happens to valve B in cylinder P when the lever arm is moved up?
  6. Give a reason for your answer in part (v).
  7. State one use of the above device.

The pressure P1 at a certain depth in river water and P2 at the same depth in sea water are related as :


A simple U tube contains mercury to the same level in both of its arms. If water is poured to a height of 13.6 cm in one arm, how much will be the rise in mercury level in the other arm?

Given : density of mercury = 13.6 x 103 kg m-3 and density of water = 103 kg m-3.


A body weighs 450 gf in air and 310 gf when completely immersed in water. Find 

(i) The volume of the body,

(ii) The loss in weight of the body, and

(iii) The upthrust on the body.

State the assumption made in part (i). 


Consider the statement given below and choose the correct option.

Assertion: Water strider slides easily on the surface of the water.

Reason: Water strider experiences less buoyant force.


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