Technoquest


Q. What is the average lifespan of a horse?

Q. What is the average lifespan of a horse?

According to the Science and Technology Desk Reference book, the maximum lifespan of a horse is 62 years. Obviously not all horses will live this long and an average value will be somewhat less than 62 years. The lifespan of a horse will depend on, amongst other things, the conditions in which it lives and the pressures that are put on it during its life.

Q. Why does hair go grey?

A hair is basically a tube filled with cells and pigment with spaces between. When the hair is young the spaces are filled with fluid and this keeps the pigment in place, so your hair keeps its colour. As we get older our skin doesn't produce hair quite so well and the spaces become filled with air. The pigment is lost and the hair gradually becomes white.

Q. Can you name a star?

Officially no. Except for the few dozen bright stars named by the ancients, stars are always designated by some alphanumeric system involving their placement in the sky, such as their ordering by position in a zone of declination, by brightness (or by variability of brightness) in a constellation, or simply by the digits of their co-ordinates in some system: in some instances the stars are simply given numbers in a catalogue by some astronomer or obser- vatory who collected them for some specific purpose - such as their relatively rapid motions with respect to other stars or because of particular features in their spectra. There are organisations that will try to sell you a star, but they have no official right to do so.

Q. Which will hit the ground first, a bullet fired from a gun or one dropped from the same height?

Both bullets will hit the ground at the same time. This is because the horizontal and vertical motions of objects can be treated separately. So although the first bullet has to travel further across the ground, both bullets fall the same distance and so reach the ground at the same time.

Q. Can cockroaches survive in a microwave oven?

Not at high levels. The microwave energy causes them to "pop" as the body fluids heat up. At low levels they can sometimes survive, probably due to some property of their outer skin. The oils in it may reflect the energy to prevent "popping". We strongly suggest you don't try this at home!

Start your day with The Independent, sign up for daily news emails
ebooks
ebooksA celebration of British elections
  • Get to the point
Latest stories from i100
Have you tried new the Independent Digital Edition apps?
Independent Dating
and  

By clicking 'Search' you
are agreeing to our
Terms of Use.

iJobs Job Widget
iJobs General

SThree: Trainee Recruitment Consultant - Dublin

£13676.46 - £16411.61 per annum + OTE: SThree: SThree Trainee Recruitment Cons...

Ashdown Group: Marketing or Business Graduate Opportunity - Norwich - £22,000

£18000 - £22000 per annum + training: Ashdown Group: Business and Marketing Gr...

SThree: Trainee Recruitment Consultant

£20000 - £25000 per annum + Commission: SThree: Are you great at building rela...

Ashdown Group: Database Analyst - Birmingham - £22,000 plus benefits

£20000 - £22000 per annum + excellent benefits: Ashdown Group: Application Sup...

Day In a Page

General Election 2015: Ed Miliband's unlikely journey from hapless geek to heart-throb

Miliband's unlikely journey from hapless geek to heart-throb

He was meant to be Labour's biggest handicap - but has become almost an asset
Amr Darrag: Ex-Muslim Brotherhood minister in exile still believes Egypt's military regime can be replaced with 'moderate' Islamic rule

'This is the battle of young Egypt for the future of our country'

Ex-Muslim Brotherhood minister Amr Darrag still believes the opposition can rid Egypt of its military regime and replace it with 'moderate' Islamic rule, he tells Robert Fisk
Why patients must rely less on doctors: Improving our own health is the 'blockbuster drug of the century'

Why patients must rely less on doctors

Improving our own health is the 'blockbuster drug of the century'
Sarah Lucas is the perfect artist to represent Britain at the Venice Biennale

Flesh in Venice

Sarah Lucas has filled the British pavilion at the Venice Biennale with slinky cats and casts of her female friends' private parts. It makes you proud to be a woman, says Karen Wright
11 best anti-ageing day creams

11 best anti-ageing day creams

Slow down the ageing process with one of these high-performance, hardworking anti-agers
Fishing for votes with Nigel Farage: The Ukip leader shows how he can work an audience as he casts his line to the disaffected of Grimsby

Fishing is on Nigel Farage's mind

Ukip leader casts a line to the disaffected
Who is bombing whom in the Middle East? It's amazing they don't all hit each other

Who is bombing whom in the Middle East?

Robert Fisk untangles the countries and factions
China's influence on fashion: At the top of the game both creatively and commercially

China's influence on fashion

At the top of the game both creatively and commercially
Lord O’Donnell: Former cabinet secretary on the election and life away from the levers of power

The man known as GOD has a reputation for getting the job done

Lord O'Donnell's three principles of rule
Rainbow shades: It's all bright on the night

Rainbow shades

It's all bright on the night
'It was first time I had ever tasted chocolate. I kept a piece, and when Amsterdam was liberated, I gave it to the first Allied soldier I saw'

Bread from heaven

Dutch survivors thank RAF for World War II drop that saved millions
Britain will be 'run for the wealthy and powerful' if Tories retain power - Labour

How 'the Axe' helped Labour

UK will be 'run for the wealthy and powerful' if Tories retain power
Rare and exclusive video shows the horrific price paid by activists for challenging the rule of jihadist extremists in Syria

The price to be paid for challenging the rule of extremists

A revolution now 'consuming its own children'
Welcome to the world of Megagames

Welcome to the world of Megagames

300 players take part in Watch the Skies! board game in London
'Nymphomaniac' actress reveals what it was really like to star in one of the most explicit films ever

Charlotte Gainsbourg on 'Nymphomaniac'

Starring in one of the most explicit films ever