Explanation

Neil Armstrong became the first human to step on the moon.

They did experiments on July 20, 1969.

He walked around for three hours.

Explanation

Explanation

Venus is the brightest planet in the Solar System.

Explanation

Water has maximum density at 4°C.

When Water is in its Solid form (Ice) below 0°C.

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

The theory of relativity usually encompasses two interrelated theories by Albert Einstein:

special relativity and general relativity, proposed and published in 1905 and 1915

E =mc2

 C in this equation Velocity of light

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Principle of Theory of relativity

ND27122022

Explanation

Venus

Eight planets in the solar system

Explanation

The SI unit of pressure is Pascal (represented as Pa) 

in SI base units, one kilogram per meter per second squared (N/m2 or kg m-1s-2)

Definition of Pressure: Pressure can be defined as the force acting per unit area.

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The SI unit of energy/work is the joule (J)

ND23-9-2023

Explanation

The National Aeronautics and Space Administration is an independent agency of the U.S. federal government

NASA is responsible for the civil space program, aeronautics research, and space research.

NASA stands for National Aeronautics and Space Administration

NASA Headquarters: Washington

NASA Founder: Dwight D. Eisenhower

NASA Founded: July 29, 1958

Explanation

CNG stands for Compressed Natural Gas

Methane is the main component of CNG 

the modern use of CNG as a fuel source began in the 1930s,

American physicist Dr. J.P. Farley discovered that natural gas could be compressed to a high-pressure 

natural gas became a transport fuel during the First World War