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54 questions
41
Physical properties of materials
Moderate
+1.0
-0.25
Why does an iron nail float on mercury while it sinks in water ?
42
Physical properties of materials
Moderate
+1.0
-0.25
A needle sinks in water whereas a ship made of iron floats on it because :
43
Physical properties of materials
Moderate
+1.0
-0.25
An iron needle floats on the surface of water due to–
44
Physical properties of materials
Moderate
+1.0
-0.25
While lifting a bucket of water from a well, we feel that the bucket
45
Physical properties of materials
Moderate
+1.0
-0.25
200 gm of water is filled in a weightless balloon. Its weight in water will be
46
Physical properties of materials
Moderate
+1.0
-0.25
The clouds float in the atmosphere because of their low
47
Physical properties of materials
Moderate
+1.0
-0.25
While floating in sea what part of an iceberg is above the surface of the sea
48
Physical properties of materials
Moderate
+1.0
-0.25
An ice cube is floating in a glass of water. What happens to the water level when the ice melts
49
Physical properties of materials
Moderate
+1.0
-0.25
A piece of ice is floating in a beaker containing water up to its brim. When whole of the ice melts
50
Physical properties of materials
Moderate
+1.0
-0.25
A body floats at 4°C water. If temperature reaches 100°C then