Advertisements
Advertisements
प्रश्न
The density of aluminium is 2.7 g cm-3 and that of brass 8.4 g cm’3. The correct statement is
विकल्प
Equal masses of aluminium and brass have equal volumes
The mass of a certain volume of brass is more than the mass of equal volume of aluminium.
The volume of a certain mass of brass is more than the volume of equal mass of aluminium.
Equal volumes of aluminium and brass have equal masses.
Advertisements
उत्तर
The mass of a certain volume of brass is more than the mass of equal volume of aluminium.
APPEARS IN
संबंधित प्रश्न
What causes buoyant force (or upthrust) on a boat ?
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
body D having density 0.85 g m-3
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 diagram given below show a body floating in three different liquids. A, B and C at different levels.
(a) In which liquid does the body experience the greatest buoyant force?
(b) Which liquid has the least density?
(c) Which liquid has the highest density?
How does the liquid pressure on a diver change if:
the diver moves to the greater depth
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.
Is thrust a scalar or vector quantity?
Complete the analogy.
Downward force: Weight:: Upward force offered by liquid: _____
Higher Order Thinking Skill.
How does a fish manage to rise up and move down in water?
The upward force that is caused due to the pressure difference in liquid (or fluid) is called ______.
