Explanation

Omer-Khayam was born in Iran in 1048 AD.

Omer-Khayam was a poet, Mathematician & Astronomer. 

Omer-Khayam introduced the modern Solar Hijri calendar, the Jalali calendar.

Place of burial: Tomb of Omar Khayyam, Iran

Main interests:

Mathematics (medieval Islamic); astronomy; Persian philosophy; Persian poetry

Explanation

There are three subatomic particles: protons, neutrons and electrons.

Two of the subatomic particles have electrical charges: protons have a positive charge

while

electrons have a negative charge.

Neutrons, on the other hand, don't have a charge.

ND11-07-2023

Explanation

Galileo di Vincenzo Bonaiuti de' Galilei was an Italian astronomer, physicist and engineer, sometimes described as a polymath. 

Galileo was the first to point out the obvious: all motion is relative.

Galileo Galilei is famous for:

 he was the first to report telescopic observations of the mountains on the moon,

the moons of Jupiter, the phases of Venus,

and the rings of Saturn

He invented an early microscope and a predecessor to the thermometer.

ND11-07-2023

Explanation

The speed of light is much faster than the speed of sound in air.

Light travels 186 thousand miles in 1 second, while sound takes almost 5 seconds to travel 1 mile

Light is a electromagnetic wave that's why it travel faster than sound wave however electromagnetic waves don't need medium to travel but sound wave need medium to travel

ND5-07-2023

Explanation

Calcium hydroxide is an odorless white powder.

It's used in industrial settings, such as:

sewage treatment,

paper production,

construction,

and food processing

ND5-07-2023

Explanation

Mercury is used in thermometers because It has a high coefficient of expansion so that even a small rise in temperature 

Galileo Galilei is claimed to be the inventor of the thermometer.

ND5-07-2023

Explanation

Three basic parts of an atom

1.   Electrons,

2.   Protons,

3.   Neutrons.

ND5-07-2023

Explanation

vacuum Tubes were replaced by Transistors.

Second-generation computers emerged with the development of Transistors.

The transistor was invented in 1947 by three scientists J. Bardeen, W.H Brattain and W. Shockley.

ND16-3-2023

ND5-07-2023

Explanation

The enzyme that synthesizes DNA,

DNA polymerase can only add nucleotides to an already existing strand or primer of DNA or RNA that is base paired with the template.

ND5-07-2023

Explanation

Local government is a generic term for the lowest tiers of public administration within a particular sovereign state

Rules

Local governments, those which govern cities, villages, counties, and towns, are established and regulated by state law.

Types:

There are three main types of local government:

counties,

municipalities (cities and towns),

and special districts.

ND5-07-2023