The density of an object is 1.23 g/cm3. in which of the following materials will it float?

water (density = 1.00 g/c m3)
olive oil (density = 0.920 g/c m3)
ethyl alcohol (density = 0.789 g/c m3)
citric acid (density = 1.660 g/c m3)

The correct option is Citric acid which has a density of

Explanation: Density plays an important role to determine whether a substance will float or sink.

A substance will float when its density is less than the density of liquid in which it is placed.

And the substance will sink, if it is placed in the liquid having less density than its own.

Density of object =

And we are asked in which liquid will it float, hence the liquid having higher density than the object will make the object float.

Hence, the correct option is Citric acid having density

i do not get it   at all

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.