Explanation

Because sound is just vibrating air, space has no air to vibrate and therefore no sound in a vacuum.

Sound waves below 20 Hz are known as infrasound.

Sound waves above 20 kHz are known as ultrasound

Sound waves transmit a medium such as a gas, liquid, or solid.

• The speed of sound in air is about 343 meters per second
• The sound travels at 1,481 m/s in water 
• The speed of sound in a vacuum is zero meters per second.

Explanation

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ND10-1-2023

Explanation

The United States is the 2nd largest goods exporter in the world, behind only China.

U.S. goods exports to the world totaled $2.1 trillion in 2022

while

China is the largest import partner of Pakistan.

ND6-08-2023

Explanation

Ethiopia Capital is Addis Ababa.

Ethiopia Currency is Birr.

Ethiopia official language is Amharic.

Ethiopia located is in Continent Africa.

Ethiopia Primary Religion is Islam, Christianity.

Ethiopia Head of Govt. is Prime Minister – Abiy Ahmed.

Ethiopia Parliament called Federal Council And House Of Representative.

Tricks for Remember

RK27-11-2022

Explanation

China's National People's Congress (NPC) is the largest parliamentary body in the world, with over 3,000 members.

List of countries

1. China - National People's Congress (NPC)
2. India - Parliament of India (Lok Sabha and Rajya Sabha combined)
3. United Kingdom - Parliament of the United Kingdom (House of Commons and House of Lords combined)
4. Pakistan - Parliament of Pakistan (National Assembly and Senate combined)
5. Bangladesh - Jatiya Sangsad

Explanation

A microphone converts sound into a small electrical current.

Sound waves hit a diaphragm that vibrates, moving a magnet near a coil.

In some designs, the coil moves within a magnet.

Other microphones, such as condenser microphones, work on the principle of capacitance.

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VU FIA PAPER 18-12-2021

Explanation

George Washington was the first President of the USA.

He was serving from 1789 to 1797.

He is often called the "Father of His Country" for his leadership in the founding of the United States.

The short list of Presidents of USA:

• 1st. George Washington
• 2nd. Adams John Adams
• 3rd. Thomas Jefferson
• 15th. James Buchanan
• 16th. Abraham Lincoln
• 17th. Andrew Johnson
• 44th. Barack Obama
• 45th. Donald Trump
• 46th. Joe Biden
• 47th. Donald Trump (Current)

Explanation

 The first country to grant women the right to vote in national elections was New Zealand, in 1893.

Australia was 2nd one 1902

Explanation

• Roger Federer is a Swiss former professional tennis player.
• Roger Federer has achieved 20 Grand Slams single titles.

Explanation

The Conclusive Argument From God (Hujjat Allah al Baligha)

The Conclusive Argument of God is the masterwork of Shah Wallah of Delhi (1762)

Originally published on: 1979

Author of Hujjat Allah al Baligha: Shah Waliullah Dehlawi

Editor of Hujjat Allah al Baligha : Marcia Hermansen

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nd9-2-2023