FACT SCIENCE

 

            FACT SCIENCE

    Why does the filament in the bulb glow?     

                               

The electric bulb is a glass bulb fitted with a filament that glows when heated by electricity. Thomas Alva Edison invented the light bulb. The light bulb consists of a glass bulb. It is fitted with a filament made of tungsten. The filament is heated to candescence by passing an electric current through it the glass bulb is filled with a noble gas that prevent the filament from melting and  then evaporating. Many attempts were made to make a bulb before Edison succeeded. The lifespan of the bulb was however approximately 40 hours. Edison conducted many experiments to extend the lifespan of the filament. He finally succeeded in December 1879.

Science

                Science

     Joint are important why?

                                   

Joints are located where two bones are joined together. They along with muscles together help the bones to move. The joints protect the bones from damaging each other while moving. The immovable joint, called sutures, hold the bones of our skull together. In movable joints, the ends of the bones that move over one another are covered with a cartilage. The cartilage helps the joints to move easily and protect the bones from sudden shocks. The hinge joint allows movement in only one direction. Knee, elbow and finger joints are hinge joints. The pivots and gliding joints is found between the skull and spine. It allows the head to move sideways, upwards and downwards. The ball and socket joint are found in the shoulder and the pelvis. The hands and legs can swing freely, while the rest of the body remains perfectly still.

Science

 

Science

Why is a compound different from a mixture?

                 

An element is a pure substance that cannot be purified further by chemical processes like heating, cooling   , electrolysis and reaction with the other chemicals .A sample of an element contains only one type of atom. A compound is a substance that is formed due to the chemical combination   of two or more different elements. A compound is represented by a formula. Compounds have a fixed   composition. The properties of a compound are different from its constituent elements. The element in a compound cannot be easily separated .on the other hand   , a mixture is a combination of two more elements or compounds. In mixtures, the elements or compounds are mixed physically. The substance in a mixture retain their own properties and they can be separated by physical processes .

SCIENCE

 

SCIENCE

Why do astronauts require special training?

An astronauts or a cosmonaut is a person who either pilots a spacecraft or acts as a crew member on it. These people have to be trained before they are sent on space missions. This is because they have to learn to control the flight simulator in the shuttle. They also have to deal with the weightlessness that they will encounter in space. They are also trained to act in various emergencies that they might encounter. The astronauts have to carry out repair work and check the support systems on the space stations. They also have to perform various scientific and medical experiments.        

 The astronauts have to learn to keep everything strapped and stowed in lockers provided in the spacecraft. They also have to exercise regulalarly to counter the effect of microgravity or weightlessness. The special training prepares them for all of this and more.

Raj news

 Raj news

PRANAB MUKHERJEE

                                                

Sad news for the Indian people because Pranab Mukherjee (Born: 11 December 1935, Mirity

Died: 31 August 2020, New Delhi)

was the former 13th President of India from 2012 to 2017, and Bharat Ratna at passed away 84 years.

Raj news

 Raj news

PRANAB MUKHERJEE

                                                

Sad news for the Indian people because Pranab Mukherjee was the former 13th President of India from 2012 to 2017, and Bharat Ratna at passed away 84 years.

FACT

 

FACT

The Saturn planet is the dense planet in our solar planet

                                                 

Saturn is one of the remarkable and beautiful planets. This is due to its rings. These rings were discovered by Galileo Galilei. They consist of thousands of narrow ringlets made of pieces of ice and rock. Saturn is one of the four gas giants of the solar system. It is the second largest planet of the solar system. It is made up of 93.7% hydrogen and 6.3% helium. Its specific gravity (ratio of density of a substance to the density of water) is 0.69 gm/cm³, i.e., it is less dense than water. It has a core of rock and ice enveloped in a laye of metallic hydrogen. The wind speeds on Saturn can reach up to 1,800 km/h. it is known to have sixty moons.

SEAWATER ARE SALTY

 

SEAWATER ARE SALTY

Oceans are large water bodies that cover 70% of the earth’s surface. They also contain 97% of the water. The rivers of the earth fall into the oceans. However, the river water fall into the oceans. However, the river water is not salty. But these rivers carry minerals and salts that have been dissolved into them when these were eroded from the mountain sides from where the rivers have passed. This is a continuous process. The oceans water itself has many minerals and organic matter dissolved in them. Element like chorine, sodium, sulphur, magnesium, calcium and potassium are present in the ocean water. These add to the salinity of the water.

BIOLOGY

 

BIOLOGY

Why is insulin required by the body

Insulin and Glucagons  are hormones that regulates the level of glucose in the blood. Insulin is secreted by the pancreas, an endocrine gland located in the abdomen. Pancreas is made up of two types of tissue: exocrine and endocrine. The endocrine tissue consists of specialised tissue known as the islets of Langerhans that produce insulin and glucagons. The pancreas secretes insulin in small amounts, but when there is a rise in the blood glucose level the amount of secretion increases to control it. On the other hand, glucagons are secreated when the sugar level in the blood is low. It helps to increase the sugar level in the blood.