Explanation

A nozzle converts the pressure energy of steam into kinetic energy, increasing its speed.

As steam passes through the nozzle, its pressure drops while velocity increases.

This high-velocity steam is used to drive turbine blades efficiently.

Explanation

The triple point of water is the unique temperature and pressure at which water coexists in all three phases — solid, liquid, and gas — in equilibrium.

Temperature: 273.16 Kelvin

This is used as a fundamental fixed point in defining the Kelvin temperature scale.

Explanation

Brazing works best on copper because it has excellent thermal conductivity and wets well with filler metals.

Copper does not form a difficult oxide layer during brazing, ensuring a strong joint.

Copper and its alloys are most commonly brazed materials in plumbing and electrical work.

Explanation

In synthetic sand, water acts as the binder when mixed with silica sand and clay.

It helps provide plasticity and strength to the mould.

The amount of water must be carefully controlled to avoid defects in casting.

Explanation

Earth is the densest planet in the solar system, with an average density of 5.52 g/cm³.

Its high density is due to a large iron-nickel core and rocky mantle.

Saturn is the least densest planet in the solar system.

Explanation

The photosphere is the lowest layer of the Sun's atmosphere.

It is the specific part that is visible to the human eye from Earth.

The term literally means "sphere of light," as most of the Sun's visible light is radiated from this layer.

It is important to note that the Sun has no solid surface.

As it is a giant ball of gas (plasma).

So the photosphere serves as its effective visible boundary. 

Explanation

Vitamin A is a group of fat-soluble retinoids.

Its preformed version found in animal products is called Retinol.

It is essential for maintaining healthy vision, skin, and immune function.

Explanation

The main source of energy in stars is nuclear fusion.

It is the process of combining atomic nuclei (usually hydrogen nuclei) to form a heavier nucleus, releasing vast amounts of energy in the process.

This energy is what makes stars shine.

Explanation

Insulin is produced by the pancreas, which is an organ located behind the stomach.

The pancreas contains clusters of cells called the Islets of Langerhans, specifically the beta cells within these islets, which are responsible for producing insulin.

Insulin plays a crucial role in regulating blood sugar levels by facilitating the uptake of glucose into cells for energy production or storage.

When blood sugar levels rise after a meal, the pancreas releases insulin to help lower blood sugar levels by promoting the uptake of glucose into cells.

Explanation