Why do Women have sweet voice?

Generally the voice of women is sweeter than that of men. Even boys have feminine voice till the age of eleven or twelve years. But later it starts becoming hoarse.

Normally, the age of eleven to thirteen years us known as the period of puberty. During this period some of glands produce certain hormones. These hormones bring many changes in the bodies of the boys produce a hormone called ‘testosterone’ which is mainly responsible for the change of voice.

Though this hormone is not produced in the girls, yet a slight change takes place in their voice also. The charge occurs mainly due to the further growth of their throat, mouth, nose and upper jaw. Due to all these factors women have a sweeter voice than men.

Varieties of Butterflies

Some of the world’s most beautiful butterflies include Krishan peacock, Bhutan glory and Kaiser-I- hind. These varieties are butting away in an experimental farm for butterflies in the northeastern region of India.

The country ahs the single largest chunk of about 1440 species of butterflies out of an estimated world total of 20000 species.

The common bird writing, the largest Indian variety with a wing span of more than 10 cm is found in the Western Ghats.

How does a Spider Spin a Web?

A spider can produce a silky substance from tiny openings on its underside. To spin a web it starts by making a frame of this silk, attaching it to firm objects, such as twigs.

When the frame is finished, the spider fixes spokes of silk across it, jut like the spokes of a wheel. Then it arranges the sticky spiral thread across these spokes, leaving a platform of non-sticky thread in the middle where it waits for its prey. Though the webs look delicate, they are very strong.

What is a Cheshire Home?

Cheshire homes are a worldwide organization looking after the incurably sick and physically handicapped for whom hospital cannot do anything. They were founded by Leonard Cheshire in 1948. Disabled persons are admitted according to their need, irrespective of race, creed or social status.

The residents enjoy the freedom of religious thought. Britain has the largest number of Cheshire Homes. Each home is run by a local committee which raises funds to run it.

What is Parchment?

Parchment is a paper-like material generally made of sheepskin. It was used for writing on before the introduction of documents or university diplomas are written till recent times on it because parchment is very long lasting.

Parchment is made rather like leather. The animal skin is scrapped to remove hair and flesh, and is cured in lime to dry and preserve it. Then it is rubbed with powered chalk to whiten and soften it.

An imitation parchment called vegetable parchment is made by treating paper with acid. Like real parchment, it is cream-colored and slightly transport.

Secret of Happiness

Always keep the gods name on your tongue. Give more than you receive. Love even those who hate you. Keep enough wealth for your need but enough your greed. Take care of every minute of your time. Make it a point to laugh everyday.

Be always child-like but never be childish. Conquer anger. Remember that god what you deserve but not what you desire. Finally if you want to be happy, think of others and if you want to be miserable, think of yourself.

Why does tickling make us Laugh?

Tickling is a funny and pleasurable sensation that many people feel when touched gently at certain parts of the body such as the armpits, the sides of the body, aboveb the waist, and the soles of the feet. The usual reaction is a pleasant sensation accompanied by laughter.

lthough the phenomenon of laughing is not well understood, it has been suggested that touching certain small tune nerve ending just beneath the surface of the skin which produces this funny sensation. In addition the pulse quickens blood pressure rises a body becomes keyed up and alert.

ne of the odd things about tickling is that you cannot do it to yourself, and not all individuals react the same way. As people age, their response to tickling lessens.

Why does Tube light get blackened at the ends after prolonged use?

A tube light consists of a glass tube containing two filament electrodes, a coating of activated phosphor and small amount of mercury. The two electrodes are placed at the two ends of the tube light. They emit sufficient electrons to initiate electronic discharge in the tube light.

This electric discharge occurs, due to the interaction of electrons with that of the atoms of the mercury. This discharge is responsible for the growing of the tube light. The emission of electrons from the electrodes is mainly in the form of streams that move across the length of tube, but a small number of electrons are also emitted around the tube.

Whenever the tube light is switched on, a comparatively small number of electrons around the electrodes strike the coated walls directly and gradually uncoat the surface. Therefore, after prolonged use, the ends of the tube light get blackened.

Why does Tube light get blackened at the ends after prolonged use?

A tube light consists of a glass tube containing two filament electrodes, a coating of activated phosphor and small amount of mercury. The two electrodes are placed at the two ends of the tube light. They emit sufficient electrons to initiate electronic discharge in the tube light.

This electric discharge occurs, due to the interaction of electrons with that of the atoms of the mercury. This discharge is responsible for the growing of the tube light. The emission of electrons from the electrodes is mainly in the form of streams that move across the length of tube, but a small number of electrons are also emitted around the tube.

Whenever the tube light is switched on, a comparatively small number of electrons around the electrodes strike the coated walls directly and gradually uncoat the surface. Therefore, after prolonged use, the ends of the tube light get blackened.

Why does water feel cooler when Glucose is added and stirred?

Whenever a solid is dissolved in water some energy change takes place. In most cases the amount of this change is negligible and is hardly noticeable.

But in some cases, it is quite large and leads to large changes in temperature, a rise or fall depending upon whether the heat of solution is positive or negative. Heat is absorbed when glucose is dissolved in water. As a result, the temperature drops and the solution feels cool.