Explanation

Explanation

• WHO = World Health Organization
• Founded: 7 April 1948
• Headquarters: Geneva, Switzerland
• Purpose: International public health organization.

Explanation

• The atomic number of hydrogen is 1.
• It is the first element on the periodic table. 
• Named by: Antoine Lavoisier (1783)
• Atomic mass: 1.00784 u
• Appearance: Colorless gas
• Symbol: H
• Protons: 1
• Electrons: 1

Last updated 26-07-2026 by NA

Explanation

• Velocity is a vector quantity. 
• A vector quantity has both magnitude and direction.
• Velocity, which describes the rate of change of position in a specific direction.
• It needs both a magnitude (speed) and a direction to be fully defined. 
• Vector Quantities: Velocity, momentum, torque, acceleration.
• Scalar Quantities: Work, distance, speed, mass.

Last verified on 12-10-2026

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

• Warsak Dam is located on the Kabul River.
• It was completed under the Colombo Plan .
• Construction began in 1949.
• The Dam was Opened in 1960.
• The height of the dam is 76 m.

Last verified on 30-03-2026

Explanation

• Minimum font size: 8
• Maximum font size: 72

Additional information:

• Standard font size: 12
• Manual font size range: 1–1638
• Shortcut to change font size manually: Ctrl + Shift + P
• Increase font size: Ctrl + ]
• Decrease font size: Ctrl + [

Last verified on 17-01-2026

Explanation

• Full Form: North Atlantic Treaty Organization
• Founded: 4 April 1949, Washington, D.C., USA
• Headquarters: Brussels, Belgium
• Members: 32 countries

List of NATO member countries:

1.        Albania

2.        Belgium

3.        Bulgaria

4.        Canada

5.        Croatia

6.        Czechia

7.        Denmark

8.        Estonia

9.        France

10.     Germany

11.     Greece

12.     Hungary

13.     Iceland

14.     Italy

15.     Latvia

16.     Lithuania

17.     Luxembourg

18.     Montenegro

19.     Netherlands

20.     North Macedonia

21.     Norway

22.     Poland

23.     Portugal

24.     Romania

25.     Slovakia

26.     Slovenia

27.     Spain

28.     Turkiye

29.     United Kingdom

30.     United States

31.     Finland

32.     Sweden

Explanation

• An ammeter is specifically designed to measure electric current.
• A multimeter can also measure current, voltage, and resistance.
• Electric current is measured in amperes (A).
• An ammeter is connected in series with the circuit to measure current.

Additional information:

• Voltmeter: Measures voltage.
• Ohmmeter: Measures resistance.

Last verified on 10-10-2026

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