Posts

Showing posts from August, 2020

Independence Day(India)2020/15th August 2020

                 Independence Day is celebrated annually on 15 August as a national holiday in India commemorating the nation's independence from the United Kingdom on 15 August 1947, the day when the provisions of the Indian Independence Act 1947, which transferred legislative sovereignty to the Indian Constituent Assembly, came into effect.                  India retained King George VI as head of state until its transition to a full republic, when the nation adopted the Constitution of India on January 26th, 1950 (celebrated as Indian Republic Day) and replaced the dominion prefix, Dominion of India, with the enactment of the sovereign law Constitution of India. India attained independence following the Independence Movement noted for largely non-violent resistance and civil disobedience. Independence coincided with the partition of India, in which British India was divided along religious lines...

What is solar eclipse?

Image
  What is solar eclipse?             W e know that the Earth is a planet of the solar system and revolves around the Sun. Similarly, the moon is a satellite of the Earth and revolves around it. The Earth and the moon both cast long shadows due to the Sun's light falls on them. Sometimes, when the Sun, the Earth and the moon come in one straight line, and the moon obstructs the light coming from the Sun, the moon obscures the Sun from our view. This is solar eclipse. For people living in that shadow of the moon falling on the Earth, it becomes dark during daytime. The situation in which the Sun, the moon and the Earth come in a straight line oCcurs only on new moon days. The solar eclipse, therefore, takes place only on new moon days.             However, the solar eclipse does not take place on every new moon day. The reason for this is that the plane of Earth's orbit makes an angle of 5° with the orbit plane of the m...

Coronavirus Outbreak: Administration in Bhiwandi on alert after fatalities increase

  Coronavirus Outbreak: Administration in Bhiwandi on alert after fatalities increase           A lthough the number of coronavirus cases in Bhiwandi remains low, the local administration is worried over the increasing fatalities in the area. On August 8, the media reports have claimed that 40 people died due to COVID-19 related death.            In the first week of August, more than 60 people have died due to coronavirus in Bhiwandi. However, the current doubling rate in Bhiwandi for the coronavirus cases is 130 days, the highest in Maharashtra.            The recovery rate in Bhiwandi has reached 86.6 per cent. Meanwhile, the death rate has gone up to 6.9 per cent. However, as per the official data, Bhiwandi has not reported any fatalities for two consecutive days on Sunday.             As of August 9, Bhiwandi has recorded 4,004 coronavirus cases till now afte...

What are the sunspots?

Image
  What are the sunspots?             T he most spectacular feature of the Sun's surface is the 'sunspots'. Galileo was the first man to observe these spots in 1610 A.D. with the help of his telescope. Through the telescope, the sunspots appeared like dark holes on the shining surface of the Sun.             These spots often appear in groups. They increase in number and then diminish in regular cycles. These cycles repeat every 7th, 11th or 14th year. The portion of the Sun having these spots emits light having lower intensity. According to modern scientific theories, these spots are formed by reactions between the electrically charged gases of the Sun and solar magnetic fields. When at any point on the Sun's surface, strong magnetic field develops, the temperature of that place is lowered. Consequently, these portions appear as black spots amidst hotter and brighter portions. The temperature of these spots is es...

What is the Sun?

  What is the Sun?             S un is one of the billions of stars that we see in the sky. It forms the nucleus of the solar system. All planets revolve around the Sun in elliptical orbits. It looks bright and big because of its proximity to the Earth than the other stars. It is at a distance of 150 million kilometres from the Earth. Its diameter is 13,92,000 kilometres, compared to the Earth's diameter of 12,756 kilometres. Its volume is approximately 1.3 million times more than that of the Earth. Even though it is gaseous, it weighs more than 300,000 times as much as the earth. It takes 8 minutes 20 seconds for its rays to reach the Earth.             Like other heavenly bodies, the Sun is also not static. It, along with its family of nine planets, revolves around the Milky Way and takes about 225 million years to complete one revolution. It also rotates at its own axis. The temperature at its centre is approximately 15...

Lessons from 1918 Spanish flu: When mask laws triggered protests in US

Image
  Lessons from 1918 Spanish flu: When mask laws triggered protests in US Then, as today, an intense debate had ensued over the utility and convenience of wearing masks. Citizens neglected the ordinance, showed defiance, and some also organised protests. In 1918, when Americans were busy aiding the Allied powers in the First World War that was raging across Europe, they were beset at home by a deadly influenza epidemic. The Spanish influenza is recorded to have killed ten times more Americans than were killed by German bombs and bullets in the war. The Spanish flu arrived in America at a time when mass transportation, mass consumption and warfare had opened up public spaces, where infectious diseases could spread. One of the most widespread and devastating epidemics of the 20th century, the flu had also arrived at a time when medicine had advanced by leaps and bounds. Historian Nancy Tomes, in her article, ‘“Destroyer and Teacher”: Managing the Masses During the 1918–1919 Influenza ...

What is the solar system?

  What is the solar system?              W e all know that our solar system consists of the Sun, the nine planets and their moons, asteroids, comets, meteoroids and other solar debris. The Sun holds all these objects in fixed orbits by its strong gravitational pull. The Sun makes up 99% of the mass of solar system. The solar system is a just a vast empty space.              The study of the nine planets revolving around the Sun is necessary to understand the solar system. It is very easy to remember the names of the nine planets. The names of the nine planets are contained in the sentence, "My very elegant mother just showed us nine planets." My – M for Mercury, Very – V for Venus, Elegant - E for Earth, Mother M for Mars, Just – J for Jupiter, Showed S for Saturn, Us - U for Uranus, Nine - N for Neptune, and Planets P - For Pluto. However, on September 7, 2006, Pluto was redesignated as a dwarf planet.  ...

How fast do the objects fall?

  How fast do the objects fall?            W hen we throw a ball up in the air, we observe that it gradually slows down, and then almost comes to a stand still, before it starts falling back to the ground. While falling down, it should be noted that the initial speed is low but gradually becomes high.            The Earth attracts all objects towards its centre with a force known as the force of gravity. The ball falls to the ground due to this force of gravity. The force of gravity makes all falling objects acquire an acceleration, which is called the acceleration due to gravity. It is denoted by 'g'.            The acceleration due to gravity accelerates the ball roughly at 9.8 metres per second per second (32 feet per second per second). This means that each second the object would move 9.8 metres faster than the previous second. The speed of the ball at different intervals of time varies a...

When to control the corona? 61537 new cases and 933 deaths of Kovid-19 in last 24 hours in India

  When to control the corona?  61537 new cases and  933 deaths of Kovid-19 in last 24 hours in India Last Modified: Sat, Aug 08 2020. 09:57 IST The Corona virus figure in India is now becoming even more frightening.  More than 61 thousand positive cases of corona virus were found in the last 24 hours on Saturday, bringing the total number of corona cases in the country to around 21 lakh.  Let us know that in just eight days of August, the number of cases of corona has been highest in the world. According to the Health Ministry data till Saturday morning, 61,537 positive cases of corona virus have been reported in the country in the last 24 hours, while 933 deaths have been reported.  After these figures, the total number of corona cases in the country has increased to 20,88,612.  Of these 6,19,088 are active cases and 14,27,006 patients have fully recovered. Corona becoming more dangerous in India, Kovid-19 cases found in 8 days of August broke all the...

How does a siphon work?

  How does a siphon work?           A siphon is a device used to transfer a liquid from one container to another. It is shaped like a bent tube with arms of unequal length.           A rubber or plastic tube is normally used as a siphon. One end of the tube is placed in the container containing the liquid to be transferred. The liquid is sucked from the other open end, which must be at a lower than the liquid level in the first vessel. Once the liquid starts flowing out, it will continue till the levels in both the containers are the same, or the first container is empty, or tillthe liquid level in the first container goes below the siphon tube level.            What makes the liquid flow from one container to the other?            It is the air pressure which forces the liquid to flow from the first container to the second, provided the level of liquid in the first c...

What are the contact lenses?

  What are the contact lenses?               T he contact lenses are worn directly on the cornea of the eyes to correct defects in vision. All the defects that are corrected by regular eyeglasses and those which cannot be corrected with glasses can now be rectified by contact lenses.             The first contact lens to be used as an eye aid was made by A.E. Fick 1887. These early lenses were first made by blowing glasses and then by grinding and polishing the bottoms of glass test tubes. These lenses were not successful and remained just a subject of academic study for a long time. Progress was made only in 1938, when plastic (methyl methacrylate) contact lenses were developed. From 1938 to 1950, the process adopted for making contact lenses was not simple. First the impression of theeye was taken, then a mould was prepared and then the lens was made out of it. Such lenses had a fluid under them and covered mo...