Explanation

• The law of universal gravitation was proposed by Isaac Newton.
• He introduced it in 1687 in his famous book Principia.
• It explains that every object attracts every other object.
• The force depends on mass and distance.

Last verified on 27-04-2026

Explanation

• Ephemeral means عارضی
• Eternal means ابدی
• Long-lasting means دیرپا
• Permanent means مستقل

Last verified on 22-02-2026

Explanation

• Balochistan has the largest proven natural gas reserves in Pakistan.
• The famous Sui Gas Field (discovered in 1952) is located here.
• 35% Reserves = Balochistan (largest).
• 60 - 70% Production = Sindh (highest).

Last verified on 27-04-2026

Explanation

• The Qibla was changed in 2 AH (624 AD).
• It happened during the Zuhr (Dhuhr) prayer.
• This event took place about 18 months after Hijrah in Madinah.
• The Qibla was changed from Bait al-Maqdis (Al-Aqsa Mosque) to Kaaba.
• Masjid al-Qiblatain is the mosque where this change occurred.
• The first Qibla of Muslims was Al-Aqsa Mosque.
• The change of Qibla is mentioned in the Holy Quran (Surah Al-Baqarah).

Last verified on 25-05-2026

Explanation

• Mars is known as the Red Planet due to its reddish appearance.
• Its surface contains iron oxide (rust) which gives it a red color.
• It is the 4th planet from the Sun in the solar system.
• Mars has two small moons: Phobos and Deimos.
• Mars is often called the “planet of future exploration”.

Last verified on 12-06-2026

Explanation

• Alaska is the largest state of the USA by area.
• It was purchased from Russia in 1867.

Additional information:

• The United States of America is located in the North American continent.
• It consists of 50 states.
• California is the largest state of the USA by population.
• Texas is the 2nd largest state by area.

Last verified on 27-04-2026

Explanation

• An electric generator is a device that converts mechanical energy into usable electrical energy.
• This process is based on the principle of electromagnetic induction.
• Discovered in 1831 by British scientist Michael Faraday.

Last verified on 27-04-2026

Explanation

• The correct preposition with “proficient” is in.
• “Proficient in” means skilled or expert in a subject.
• It is commonly used with subjects like mathematics, English, science.

Last verified on 27-04-2026

Explanation

• This is a Third Conditional sentence.
• It talks about a past unreal situation.
• Structure: If + past perfect, would have + V3.
• So correct form is “had arrived”.

Last verified on 27-04-2026

Explanation

• Vitamin K helps to make various proteins that are needed for blood clotting and the building of bones.
• Prothrombin is a vitamin K-dependent protein directly involved with blood clotting.

• Vitamin C may protect the body against the effects of pollution.
• It may also prevent blood clots and reduce bruising.

Last verified on 31-03-2026