Explanation

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Explanation

Explanation

Sound travels at different speeds depending on what it is traveling through. Of the three mediums (gas, liquid, and solid) sound waves travel the slowest through gases, faster through liquids, and fastest through solids.

Temperature also affects the speed of sound.

Explanation

Karachi remained capital of Pakistan from 1947 to 1959.

Rawalpindi remained capital of Pakistan from 1959 to 1967.

Islamabad is the current capital of Pakistan since 14 August 1967.

Explanation

Know about Allama Iqbal

Born: November 9, 1877 (Sialkot)

Father: Sheikh Noor Muhammad

Mother: Imam Bibi

Received PhD: Germany

Title: Poet of the East

Famous books: Bang-e-Dara, Zarb-i-Kalim, Armughan-e-Hijaz

Famous Punjabi Books/Poem: Piyaara Jedi, Baba Bakri Wala

Died: 21 April 1938

Burial: Badshahi Mosque in Lahore

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It was formed in 2013 as a response to sustained and increasingly visible violence against black communities, with the purpose of creating a united front and establishing a political platform.

Explanation

A power supply unit  converts mains AC to low-voltage regulated DC power for the internal components of a computer.

Modern personal computers universally use switched-mode power supplies.

Explanation

The Battle of Nahavand  was fought in 642 between Arab Muslims under Umar and Sassanid Persian armies.

The battle is known to Muslims as the "Victory of Victories."

It was a victory for the Rashidun Caliphate and the Persians consequently lost the surrounding cities including Spaha

Explanation

Electrical switches work according to a primary design.

The most common switches are the on/off toggle ones