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How do binoculars work?

22 May, 2020
Binoculars belonging to a Congressional Medal of Honor winner © Minnesota Historical Society (Flickr) What are Binoculars? Binoculars are, in essence, two telescopes mounted side by side in a hand-held device. However, unlike telescopes, binoculars are designed to be views…

How many hours are in a year?

22 May, 2020
© jakeandlindsay (Flickr) Calculator © jakeandlindsay (Flickr) Number of hours in a day, and number of days in a year Hours in a dayMost people know that there are 24 hours in a day. This is the simple bit of…

How many miles are in 5k?

22 May, 2020
© .shock young man ready for run on the start position ready to run © .shock Why should you want to know? There are all sorts of reasons for wanting to convert miles to kilometres, but here are the commonest…

How much does one gallon of water weigh?

22 May, 2020
© gothick_matt (Flickr) Gallons © gothick_matt (Flickr) History of a gallon A gallon is a measure of volume, equating to either 3.79L or 4.55L depending on its usage.The imperial (UK) gallon is equal to 4.546 L. It was made obsolete…

How many centimetres are in a metre?

22 May, 2020
© Sergey yellow ruler isolated on white © Sergey Introducing the metric system Before metric measurements were introduced, the length of something was measured using the imperial system which included feet, inches, miles, furlongs and others. The lack of common…

How many feet are in a metre?

22 May, 2020
© aussiegall (Flickr) Measuring time © aussiegall (Flickr) Origins of the Imperial system The units in use in the imperial system were historically derived from units used by the Roman Legion, and were in use in England at the time…

How many miles are in a kilometre?

22 May, 2020
© Semhur (commons.wikimedia.org) A Kilometre and Mile Unit Comparison Scale © Semhur (commons.wikimedia.org) Basics of kilometres and miles The kilometre (symbolised as km) is a distance unit in the metric system mostly used to express geographical distances. It is equal…

Converting imperial measurements to metric

22 May, 2020
© Joe Shlabotnik (Flickr) Calculators © Joe Shlabotnik (Flickr) Useful conversion factorsThe UK still uses miles not kilometres, many people still think in degrees fahrenheit rather than centigrade, and weights are still sometimes given in pounds rather than kilograms.There are…

How does the heart work?

22 May, 2020
© qthomasbower (Flickr) Hearts (Explored!) © qthomasbower (Flickr) Muscles One of the key characteristics of the heart is its musculature. Skeletal muscle - those such as biceps and triceps that are attached to the bones via ligaments in order to…

How to make fiberglass?

22 May, 2020
© WikiMedia (Wikimedia) 1 Examples of filler (microspheres) or reinforcements (fibers or fabri © WikiMedia (Wikimedia) Material properties Fiberglass material on its own is almost useless. To get the best out of this material, it needs to be cured with…

Man made diamonds: the facts

22 May, 2020
© Socialbutterflyjewellery (flickr.com) Swarovski Stones © Socialbutterflyjewellery (flickr.com) What are man made diamonds? Synthetic or artificial or man made diamonds are gems produced in labs through various chemical processes. Their molecular structure is identical to the natural diamonds and their…

Measuring the acidity of an aqueous solution

22 May, 2020
© Andrey Kiselev (Fotolia) analyze © Andrey Kiselev (Fotolia) Certain compounds when dissolved in water (H_2O) will cause it to dissociated into constituent hydrogen (H^^+) and hydroxide (OH^^-) ions. Solutions with more hydrogen ions than hydroxide ions are acidic; those…

Respiration: discovery and how it works

22 May, 2020
© LadyofHats, Wikimedia Common The Human Respiratory System, and what happens when we respire. © LadyofHats, Wikimedia Common Breathing is the process that moves air in and out of the lungs. Respiration occurs when we breathe in and out. As…

What makes clouds form?

22 May, 2020
© kevindooley (Flickr) Bowl of clouds © kevindooley (Flickr) What are clouds? There are many different types of clouds in our skies – but while each one varies in shape, size and density, all are made up of the same…

How to make a dry ice bomb?

22 May, 2020
1. WARNING © SparkFunElectronics (Flickr) Dry Ice © SparkFunElectronics (Flickr) THIS EXPERIMENT IS EXTREMELY DANGEROUS. PROCEED WITH CAUTION, OR WITH ADULT SUPERVISION. DO NOT ALLOW A DRY ICE BOMB TO EXPLODE ANYWHERE NEAR YOURSELF OR ANOTHER LIVING BEING. 2. Items…

Picking the right flowers for your wedding

22 May, 2020
© Candie_N (Flickr) Pink rose without frame © Candie_N (Flickr) Roses typically infer love, joy, and beauty. They are the traditional symbol of love. There are roses that are a solid colour, bicoloured, striped, or even tipped. Most of the…
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