How can you appreciate the technology of making ships those float on water using the material which sink in water ? `(AS_(6))`

How do you appreciate the role of the higher specific heat of water in stabilizing atmospheric temperature during winter and summer seasons?

Can you make iron to float in water ? How ? (AS_(3))

Why does a ship made of iron float while a piece of iron sinks in water?

Why do some objects float on the water ? And some sink (AS_(1))

A glass beaker is placed partially filled with water in a sink it has a mass of 390 gm and an interior volume of 500 cm^(2) when water starts filling the sink, it is found that if beaker is less than half full it will float but if it is more than half full it remains on the bottom of the sink as the water rises to its rim, what is the density of the material of which the beaker is made?

In a nuclear reactor a neutron of high speed (typically 10^(7) ms^(-1) ) must be slowed to of interacting with isotope ._(92)^(235)U and causing it to fission . Show that a neutron can lose most of its kinetic energy in an elastic collision with a light nuclei like deuterium or carbon which has a mass of only a few times the neutron mass . the material making up the light nuclei , usually heavy water (D_(2)O) or graphite is called a moderator .