Explanation

• Kilometers per second: ≈ 300,000 km/s
• Speed in vacuum: 299,792,458 m/s
• Approximate value: 3 × 10⁸ m/s
• Symbol: c
• Distance traveled in 1 second: About 300,000 km
• Light from the Sun takes about 8 minutes 20 seconds to reach the Earth.

Last verified on 16-05-2026

Explanation

When fasting was made obligatory:

• Timing: Second year of Hijrah (2 AH / 624 CE), in the month of Sha'ban
• First fast: Ramadan 2 AH
• Key verse: Surah Al-Baqarah (183–185)
• Prophet's practice: Fasted Ramadan for 9 years (until 11 AH)
• Before Ramadan: Muslims fasted on Ashura (10th Muharram) and three days each month

Last updated by NS on 5-09-2026

Explanation

• Hybrid computer processes both analog and digital signals.
• It combines the features of analog and digital computers.
• Used in medical equipment, scientific research, and industrial systems.

Explanation

• Rear view mirrors in vehicles are convex mirrors.
• They give a wider field of view.
• Images formed are virtual, upright, and smaller.
• This helps drivers see more traffic behind them.
• It is a curved mirror that bulges outward.
• It is commonly used in side mirrors of cars, buses, and motorcycles.

Last verified 26-04-2026

Explanation

• China is Pakistan’s largest trade partner.
• Trade between Pakistan and China increased significantly after CPEC (2015).
• Both countries signed a Free Trade Agreement (FTA) in 2006.
• This partnership plays a key role in Pakistan’s economy and infrastructure development.

Last verified on 17-05-2026

Explanation

• The current Secretary-General of the United Nations is António Guterres from Portugal.
• He began his first term on January 1, 2017.
• He is currently serving his second term.

Last verified on 07-10-2026

Explanation

• Warren Hastings was the first Governor-General of Bengal.
• He serving from 1774 to 1785.
• The office was created under the Regulating Act of 1773.

Additional information:

• First Governor of Bengal → Robert Clive
• First Governor-General of India → William Bentinck
• First Viceroy of India → Lord Canning
• Last Viceroy of India → Lord Mountbatten

Last verified on 07-10-2026

Explanation

• UNO Founded: 24 October 1945 (after World War II 1939–1945)

Additional information:

• UNO Stands for: United Nations Organization
• Headquarters: Manhattan, New York City
• Member States: 193 countries
• Official Languages (6): Arabic, Chinese, English, French, Russian, Spanish
• Motto: “It’s your world!” (commonly used awareness slogan)
• Pakistan Joined UNO: 30 September 1947

Last verified on 10-06-2026

Explanation

• An Operating System (OS) is system software.
• It manages computer hardware and provides a platform for running application software.
• It acts as an interface between the user and computer hardware.

Functions of an Operating System:

• Allocates resources
• Monitors activities
• Manages disks and files

Last verified on 02-07-2026

Explanation

• Pakistan's second Constitution was enforced on 8 June 1962.
• It was introduced during the rule of Field Marshal Muhammad Ayub Khan.
• It introduced a presidential system instead of a parliamentary system.

Additional information:

• 23 March 1956 – First Constitution enforced.
• 14 August 1973 – Third (current) Constitution enforced.

Last verified on 07-07-2026