Physical Quantities and Measurment

An irregular solid which completely immersed in water displaces 10 ml of water.The volume of the solid is:

• 5 ml

• 10 ml

• 15 ml

• 20 ml

which of the following is the SI unit of relative density?

• kg

• m

• kg/m3

• no unit

Relative Density is also known as:

• Density

• Gravity

• specific gravity

• mass

a device used to measure the relative density of a liquid is known as:

• thermometer

• hydrometer

• barometer

• spring balanace

which of the following substance has the greatest density?

• aluminium

• water

• oxygen

• air

which of the following liquid will float on water (density-1g/ml)?

• sea water(density-1.025 g/ml)

• honey (density- 1.42 g/ml)

• gasoline (density-0.71 g/ml)

• glycerine (density-1.26 g/ml)

the markings on the hull of the ship that indicate the level to which the ship can be submerged in sea water are called:

• horizontal lines

• vertical lines

• skew lines

• plimsoll lines

for a given rise in temperature, the increase in density is maximum in case of:

• gases

• liquids

• solids

• none of these

when a substance is heated, its density:

• increase

• decrease

• remains same

• become zero

In convection current, hot air moves:

• upwards

• downwards

• to the left

• to the right