Two identical solid pieces, one of gold and other of silver, when immersed completely in water exhibit equal weights. When weighed in air (given that, density of gold is greater than that of silver),

Density of water is

A. maximum at 0°C

B. minimum at 0°C

C. maximum at 4°C

D. minimum at -4°C

The body is called perfectly plastic body

A. if the body completely gain its original shape after removal of deforming force

B. if the body remains in deformed shape even after removal of the deforming force

C. if weight of the body is equal to force of buoyancy

D. None of the above

Pressure is a scalar quantity because

A. it is the ratio of force to area and both force and area are vectors

B. it is the ratio of magnitude of force to area

C. it is the ratio of component of force (normal to area) to area

D. None of the above

Why do water droplets always take a round shape when dropped onto plane surfaces?

A. Due to gravity

B. Due to atmospheric pressure

C. Due to the presence of Eddy current in the air

D. Due to exertion of surface tension by the molecules