Explanation

• A Barometer is an instrument used to measure air (atmospheric) pressure.
• It helps in weather forecasting by measuring changes in atmospheric pressure.
• The mercury barometer is the oldest type of barometer.
• It was invented by Evangelista Torricelli in 1643.
• Barometers are widely used in meteorology and aviation.

Last verified on 09-07-2026

Explanation

Explanation

• Al-Biruni was a famous Muslim mathematician, astronomer, and geographer.
• He calculated the Earth's radius using trigonometric principles and measurements of the angle of dip from a mountain.
• His estimated radius was approximately 6,339.6 km, which was remarkably close to the modern mean radius of about 6,371 km.
• He lived from 973 CE to 1048 CE.

Last verified on 09-11-2026

Explanation

• Surah Al-Naml has Bismillah twice in the Holy Quran.
• It contains Bismillah at the beginning and again in Verse 30 (message of Prophet Sulaiman AS).
• Surah: 27th
• Verses: 93rd
• Type: Makki Surah
• Name Meaning: “The Ants”

Additional information:

• In contrast, Surah Al-Toba starts without Bismillah.
• Bismillahir Rahmanir Raheem is repeated 114 times in the Quran.

Last verified on 12-06-2026

Explanation

A percentage is a number or ratio expressed as a fraction of 100.

20% as a fraction is 1/5.

Explanation

• Verse 282 of Surah Al-Baqarah is the longest verse in the Quran.
• It is known as Ayat ad-Dayn (آیت الدَّيْن).
• Because it deals with loans and financial transactions.
• Al-Baqarah (The Cow) is the second and longest Surah of the Quran.
• It contains 286 verses.
• Position: Juz 1–3
• Classification: Medinan
• Rukus: 40
• Approximate Letters: 25,500

Last updated 08 Nov 2026 by NA

Explanation

• - Full name: Fariduddin Masud Ganj Shakar.
• - Born: 1188 CE (573 AH).
• - Birthplace: Kothewal, near Multan.
• - Sufi Order: Chishti Order (Chishtiyya).
• - Shrine: Pakpattan, Punjab, Pakistan.
• - Title: First major Punjabi Sufi poet; often called the first poet of Punjabi literature.

Last updated 08 Nov 2026 by NA

Explanation

• The process of starting an operating system when a user turns on a computer is called booting.
• Booting is a startup sequence that powers up the system and loads the operating system. 
• The booting process involves the following steps: 
• Power on
• The Power-On Self-Test
• Find and load the OS
• Drivers and system configuration
• User login and authentication

Last updated 08 Nov 2026 by NA

Explanation

• “Red letter day” refers to a very important or special day in someone’s life.
• It comes from calendars where important dates were marked in red.

Last updated 08 Nov 2026 by NA

Explanation

• The cell was first coined by an English scientist Robert Hooke in the year 1665.
• Later the cell theory was given by Matthias Schleiden and Theodor Schwann.

Last verified on 08-11-2026