A child was killed through asphyxiation. Postmortem confmned it because a piece of lung put in water

A child was killed througn aspnyxlation. Post morturm confirmed it because a piece of lung put in water

A steel ball falls slowly through water than through air because

A bucket of water is suspended from a spring balance. What happens to reading of balance (a) when a piece of stone suspended from a string is immersed in the water without touching the bucket (b) when a piece of lead or cork is put in the water in the bucket.

A force F acts between sodium and chlorine ions of salt (sodium chloride) when put 1 cm apart in air. The permittivity of air and dielectric constant of water are epsilon_(0) and k respectively. When a piece of salt is put in water, electrical force acting between sodium and chlorine ions 1cm apart is

In 1950s, there were hardly any mosquitoes in Delhi. To use of the pesticide DDT on standing water killed their larvae. It is believed that now there are mosquitoes because they evolved DDT resistance through the interaction of mutation and natural selection. Point wise state in a sequence how that could have happened ?

A piece of nail sinks in water but a boat floats in it because

Choose the correct option A fish dies when it is put in an aquarium filled with previously boiled water but cooled to room temperature. The reason for this is because the water in the aquarium is

Water is pulled upward through the xylem against gravity because of…………………. between water molecules and ……………………………. of water molecules to the hydrophilic walls of narrow xylem channels