Why do marine animals live deep inside of lake when the surface of the lake freezes?

Explain why the surface of a lake freezes first.

Why do aquatic animals die in boiled water ?

Statement-1: Upthurst on a solid block of iron when immersed in a lake will be less on the surface than on the bed of the lake. Statement-2: On the surface of the lake density of water will be less than that at the bed and upthrust depends on the density of liquid.

Why do the bodies of deep sea burst when they are brought to the surface of sea?

A stone of relative density K is released from rest on the surface of a lake. If viscous effects are lgnored, the stone sinks in water with an acceleration of

Explain why a gas bubble released at the bottom of a lake grows in size as it rises to the surface of the lake.

When and why do some animals like frogs hibernate ?

A coin lies on the bottom of a lake 2m deep at a horizontal distance x from the spotlight (a source of thin parallel been of light) situated 1m above the surface of a liquid of refractive index mu = sqrt(2) ) and height 2m . Find x .

From a point 36 m above the surface of a lake , the angle of elevation of a bird is observed to be 30^(@) and angle of depression of its image in the water of the lake is observed to be 60^(@) . Find the actual of the bird above the surface of the lake .

The mass of living organisms in a lake is defined to be the biomass of the lake. If the biomass in a lake doubles each year, which of the following graphs could model the biomass in the lake as a function of time? (Note: In each graph below, O represents (0, 0).)