Explanation

A microscope is designed to magnify tiny, close-up objects that are not visible to the naked eye.

It helps in studying small details of specimens like cells, microorganisms, and other minute structures.

Explanation

Penicillin works best on gram-positive bacteria by inhibiting peptidoglycan production, making the cells leaky and fragile

The cells burst open and are much easier for the immune system to break down, which helps the sick person heal more quickly.

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Related Question

Penicillin was discovered by Alexander Flaming In 1928

Penicillin was the first true antibiotic

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

Astronomy is the study of everything in the universe beyond Earth's atmosphere

Galileo Galilei is often referred to as the "father of modern astronomy" and the "father of modern physics".

Explanation

Al-Razi was a musician and a money-changer until his 30s

he began to study medicine in Baghdad.

one of the greatest physicians of the medieval period, writing over 200 works

Al Razi is considered the “original portrayer” of smallpox.

Explanation

The Wright Brothers, Orville and Wilbur, invented and flew the first successful airplane.

This historic flight took place on December 17, 1903, in Kitty Hawk, North Carolina.

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

China has successfully landed a robot on the surface of Mars on 15 May 2021.

China has become the third country after Russia and the United States of America in history

The rover 'Zhurong' will spend around 90 Martian days on the planet.

A Martian day is around 24 hours and 39 minutes.

This rover is named after the mythical Chinese god of fire.

Explanation

In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube.

Water freeze at 32 F and boils at 212 F

Explanation

Henry Cavendish - He discovered hydrogen gas and the composition of water contains two parts of hydrogen and one part of oxygen.

Symbol: H

Atomic mass: 1.00784 u

Atomic number: 1

Named by: Antoine Lavoisier (1783)