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What is refraction?

Refraction is what occurs when light passes from one medium to another (for example, air to water) and because of the difference in the medium, the speed changes. This change in speed of light causes it to '...
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Answered by Tanika D. • Physics tutor
2704 Views

How would I know which question to pick when sitting my creative writing exam?

Read through all six very carefully. From the first read through, eliminate the scenarios and scenes which you have little to zero knowledge about, and those which you have no vague, but immediate ideas for....
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A force of 13.8 N was used to lift a mass 30 cm vertically through a liquid. Calculate the work done in lifting the mass, stating the correct units.

Either from memory or using the formula booklet provided we know Work Done = Force x Distance Moved (in the direction of the force). Therefore we can use the values given and this formula to workout our answ...
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Answered by Harry G. • Physics tutor
4764 Views

How does the body respond to raise its core body temprature?

shivering - muscles contract rapidly, causes more respiration which releases energy blood vessels near skin constrict - blood flow to skin decreases, less energy lost to surroundings
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Answered by Cara S. • Biology tutor
2750 Views

What is the purpose of the Russian letter "ь" (мягкий знак; myahkiy znak)?

The letter "ь" is very important in the Russian language. Its purpose is to make the pronunciation of the preceding consonant soft. To illustrate, look at the Russian word "конь" (horse)....
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Answered by Nikita Z. • Russian tutor
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