English

Explain the meaning of the statement ‘relative density of aluminium is 2.7’.

Advertisements
Advertisements

Question

Explain the meaning of the statement

‘Relative density of aluminium is 2.7’.

Short/Brief Note
Advertisements

Solution

The statement ‘Relative density of aluminium is 2.7’ means a piece of aluminium of any volume has mass 2.7 times that of an equal volume of water. i.e. Aluminium is 2.7 times heavier than water.

shaalaa.com
  Is there an error in this question or solution?
Chapter 2: Physical Quantities and Measurement - Short/Long Answer Questions [Page 35]

APPEARS IN

S.S. Shome Concise Physics [English] Class 8 ICSE
Chapter 2 Physical Quantities and Measurement
Short/Long Answer Questions | Q 13 | Page 35

RELATED QUESTIONS

The density of brass is 8.4 g cm-3. What do you mean by this statement?


Pressure at the free surface of a water lake is P1, while at a point at depth h below its free surface is P2. (a) How are P1 and P2 related? (b)Which is more P1 or P2?


Explain why a gas bubble released at the bottom of a lake grows in size as it rises to the surface of the lake.


State the laws of liquid pressure.


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 area of base of a cylindrical vessel is 300 cm2. Water (density= 1000 kg m-3) is poured into it up to a depth of 6 cm. Calculate : (a) the pressure and (b) the thrust of water on the base. (g = 10m s-2.


Select the correct option:

When an object sinks in a liquid, its:


The magnitude of buoyant force acting on an object immersed in a liquid depends on ______ of the liquid.


Most buoyant objects are those with relatively ______.

  1. high volume
  2. higher mass
  3. low density
  4. less viscosity

In a fluid, buoyant force exists because the pressure at the ______ of an object is greater than the pressure at the top.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×