Explanation

A thermos flask is designed to reduce heat transfer through all three methods:

• Conduction: The flask has a vacuum insulation, which eliminates conduction through the container.
• Convection: The flask's design and vacuum insulation prevent convective heat transfer.
• Radiation: The flask's reflective coating minimizes radiant heat transfer.

Explanation

 Aviophobia is the specific fear or anxiety associated with flying in airplanes. 

Explanation

• GPS (Global Positioning System) is used for identifying the location of objects on Earth.
• GPS provides accurate positioning and timing information, enabling users to determine their precise location anywhere on Earth.
• GPS stands for Global Positioning System, a network of satellites orbiting the Earth.
• It provide location information and timing signals to GPS receivers on the ground.

Explanation

The Earth moves around its axis once in 24 hours — this is called rotation.

While its motion around the Sun once in approximately 365 days is called a revolution.

(Note: You mentioned "356 days" — this appears to be a typo. The correct value is approximately 365.25 days.)

Explanation

Explanation

Geroge Stephenson designed the railway steam engine 

The locomotives were the work of Stephenson and his son Robert.

Explanation

• Humans are born with around 300 bones, but as they grow and develop.
• Some of these bones fuse together, resulting in a total of 206 bones in the adult human skeleton.
• This process of bone fusion, called ossification.

Explanation

Calcium phosphate, specifically hydroxyapatite, is the main component of bones and teeth.

It is a calcium salt of phosphoric acid.

It is the primary mineral constituent of bone tissue, making up about 70-80% of bone dry weight.

Calcium phosphate gives bones and teeth their strength and rigidity.

Explanation

The blood circulation rate in human arteries typically ranges from 10 to 20 cm/s.

This rate can vary depending on factors like blood pressure, vessel diameter, and overall health.

Explanation

 Lordosis refers to an excessive inward curvature of the lower spine, commonly known as "hollow back" or "swayback".