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What is red shift?

You see colours due to the length of a wave of light. When a distant galaxy is moving away from us the wavelength increases due to the Doppler Effect (which you may have studied using the sound of a passing ...
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Answered by Carys L. • Maths tutor
4513 Views

Solve the two simultaneous equations: 2x - 5y = 11 and 3x + 2y = 7

Step One: Write the first equation and then write the second equation underneath. Label the first equation A and the second equation B. You can now see clearly that each equation contains an x component and ...
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Answered by Priya L. • Maths tutor
9702 Views

How do I remember when to use the perfect or the imperfect tense?

In French the imperfect tense is most often used when referring to a habitual action in the past, something that you used to do frequently, and to describe something that happened over an extended period of ...
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Answered by Margaux S. • French tutor
3299 Views

How can one know the different gender that each greek word falls into?

According to the ending (suffix) of most greek words one can easily tell the gender to which they belong to. Words that end in -η are usually feminine while words that end in -oς are masculine. Lastly, words...
SK
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A bag has 24 sweet of different colours: 10 red, 8 blue and 6 yellow. What is the probabilty of not getting a blue sweet ?

First the thing you need to know before answering the question is, the probably of not getting something is [ 1 - the probabilty of getting something ], so the probabilty of getting a blue sweet is , the num...
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Answered by Faizul H. • Maths tutor
3301 Views