Explanation

Number of moons in the planets

Saturn: 83

Jupiter: 92

Uranus: 27

Neptune: 14

Mars: 2

Earth: 1

Venus: 0

Mercury: 0

Explanation

A rain gauge is a meteorological instrument to measure the precipitating rain in a given amount of time per unit area.

The instrument consists of a collection container that is placed in an open area.

Explanation

Sir Isaac Newton was an English mathematician, physicist, astronomer, alchemist, theologian,

Author widely recognised as one of the greatest mathematicians

And physicists of all time and among the most influential scientists. 

Explanation

Sputnik 1 was the first artificial Earth satellite.

It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October 1957 as part of the Soviet space program.

ND2-03-2023

Explanation

• In a parallel circuit, if one bulb blows, the other bulb will remain the same.
• This is because each bulb in a parallel circuit has its own independent path to the power source.
• The failure of one bulb does not affect the current flowing through the other bulb's path.

Explanation

• In space exploration, a spectroscope is typically used to analyze the light coming from stars, planets, and other celestial objects to determine their chemical composition.
• This helps scientists understand the formation and evolution of stars, planets, and galaxies.

Explanation

Ultrasound is sound with frequencies greater than 20 kilohertz.

This frequency is the approximate upper audible limit of human hearing in healthy young adults

while 

The first article on the history of ultrasound was written in 1948

Explanation

DNA (Deoxyribonucleic acid) is a large molecule made up of smaller units called nucleotides. Each nucleotide is composed of:

• A sugar molecule (deoxyribose)
• A phosphate group
• One of four nitrogenous bases: Adenine (A), Guanine (G), Cytosine (C), and Thymine (T)

Explanation

According to Boyle's Law, for a fixed mass of gas at constant temperature, the pressure of the gas is inversely proportional to its volume

. This means that if you decrease the volume, the pressure will increase, and vice versa.

Mathematically, it is expressed as: P1V1 =P 2​ V2  where  P is the pressure, and V is the volume.

Therefore, if the volume decreases, the pressure will increase.

Explanation

As an object approaches the speed of light, the object's mass becomes infinite and so does the energy required to move it.

That means it is impossible for any matter to go faster than light travels.