Explanation

Benjamin Franklin discovered electricity and invented the lightning rod and bifocals.

Benjamin Franklin's 1752 kite experiment proved lightning is electricity.

Explanation

Isaac Newton proposed the law in 1687

and utilized it to clarify the observed movements of the planets and their moons.

The law of Gravitation had been mathematically formulated by Johannes Kepler in the early 17th century.

ND28-4-2023

Explanation

Origin of species using Natural Selection was the work of Charles Darwin.

It was published on 24 November 1859,

..

Charles Darwin's discoveries included.

four different species of giant ground sloth (some of the largest land mammals ever to have lived), a gomphothere,

and the remains of an extinct horse.

ND16-8-2023

Explanation

Television Radio Phones spread signals through Electromagnetic Waves

Sound travels at approximately 1,100 feet per second (766 miles per hour).

while

Radio waves travel at the speed of light, which is approximately 186,000 miles per second.

Explanation

Benjamin Franklin invented the lightning rod, a device used to protect buildings from lightning strikes.

He made this invention in 1752 as part of his experiments with electricity.

Explanation

Joseph Priestley discovered laughing gas (nitrous oxide) in 1772.

It was later studied for its anesthetic properties.

Explanation

Benjamin Franklin invented the lightning rod, a device used to protect buildings from lightning strikes.

He made this invention in 1752 as part of his experiments with electricity.

Explanation

• Robert Watson-Watt: Scottish engineer and inventor.
• Known For: Developing the first practical radar system.
• First Demonstration: 1935

Additional information

• Radar: Stands for Radio Detection and Ranging.
• Function: Uses radio waves to detect and locate objects.
• Importance: Played a crucial role during World War II.

Explanation

At the top of the waterfall, energy is stored in the form of gravitational potential energy

but when it falls, it gets converted from potential to kinetic energy

Potential energy due to the object's height above the Earth is converted to kinetic energy as it falls

Explanation

Rene Laennec, a French physician, invented the stethoscope in 1816.

He created the first stethoscope using a wooden tube that allowed him to listen to the heart and lungs of a patient without placing his ear on their chest.