Science & Mathematics Questions & Answers

Science & Mathematics Questions & Answers

What is proton therapy?

All matter consists of atoms and all atoms have protons along with other subatomic particles. When an accelerated beam of proton is incident on the target tissue like a tumour, due to their relatively enormous size, protons scatter less easily in the tissue and there is very little lateral dispersion. Therefore, the beam stays focused on the tumour shape without …

Read More »

What is Pluto – a Star or a Comet?

Which is the planet farthest from the sun? Pluto, of course. But, some recent findings suggest that Pluto is not a planet at all. It seems Pluto could actually be a comet, reports the National Geographic website. Basically, it is Pluto’s small size that has got it into trouble. It has a diameter of approximately 1,420 miles or 2,280 kilometers. …

Read More »

What is pisciculture?

The breeding, rearing, and transplantation of fish by artificial means is called pisciculture, in other words, fish farming. It is the principal form of aquaculture, while other methods may fall under mariculture. It involves raising fish commercially in tanks or enclosures, usually for food. A facility that releases juvenile fish into the wild for recreational fishing or to supplement a …

Read More »

What is photosynthesis?

Photosynthesis is the process by which green plants make food for themselves-and, indirectly, for all animals, including human beings. Without it, life as we know it on this earth would be impossible. In photosynthesis plants combine water and salts in the soil, and carbon dioxide in the air to build up organic compounds, such as sugar starch and proteins. To …

Read More »

What is Philosopher’s wool?

The compound zinc oxide (ZnO) is called philosopher’s wool. Alchemists, as part of their rituals, would burn zinc in air and collect the residue, which formed into white woolly tufts. They called it lana philosophica in Latin, meaning philosopher’s wool. Zinc oxide has many uses: as white pigment in paints, component in zinc ointment for treating skin diseases, material in …

Read More »

What is pesticide peril in vegetables?

Pesticide remains in vegetables can cause neurological and blood disorders, lung ailments and affect the reproductive system of women. Agriculture workers are as prone to risks as consumers. Prolonged exposure to raw pesticides (common among agricultural workers) or consumption of pesticide-infected vegetables can result in leukaemia and cancer of the skin, lips, stomach and prostrate. Complaints of chronic fatigue, excessive …

Read More »

What is permafrost?

In cold countries, the soil freezes hard in winter. In summer, the top few centimeters may thaw, while lower down the stays frozen. This permanently frozen soil is called permafrost. Several extinct woolly mammoths, which died about 45,000 years ago, have been dug out of the permafrost in Siberia. The meat of one of them, preserved in this natural refrigerator, …

Read More »