loaded test tube placed in pure milk sinks to a certain mark (M) Now some water is mixed - Science - Gravitation

Question

loaded test tube placed in pure milk sinks to a certain mark (M)
Now some water is mixed with the milk Will the test tube sink more
or less? Explain
A Piece of ice is placed gently on the surface of water in a
glass so that when ice floats, the water comes up to the brim of
the glass what will happen to the level of water when the ice
melts? will it overflow? (2) in the above case what will happen if
instead of water the glass is filled with (a) with a liquid denser
than water (b) a liquid lighter than water

Kranav Sharma · Accepted Answer

(a) Whether an object sinks or floats depends upon the its
density and the density of the liquid its placed inside of If the
density of the liquid is more than the object it will float and
vice versa The density of milk-water mixture is less compared to
only milk The density difference between the two (liquid and
object) has now changed This would lead the test tube to sink
deeper than before
(b) If the ice is placed in water it will float as the density
of ice is less when compared This is because same the mass, ice has
a larger volume If the ice melts it will turn into water and the
volume of the combined water would now be less than the before,
this is because
volume of water + ice > volume of water + volume of ice
turned into water
SO, water not overflow if the ice was completely immersed in
water before melting
If use an other liquid
if the density of the liquid is more than water than the ice
will float, like before
if the density of the liquid is less than water than the ice
will sink to the bottom