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What are the advantages of animals eating excess food and putting on weight for winter?

1) They put on fat which is a good insulator and allows the animal to retain its heat. 2) The animal in putting on weight will become larger and have a smaller surface area to volume ratio which also decreas...
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Answered by Ahmad T. • Biology tutor
4927 Views

Describe and explain the trend in reactivity down the alkali metals group.

Reactivity increases down the group. This is because the outer electron in each atom is further away from the nucleus as you go down the group and so the electrostatic forces between the nucleus and the oute...
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Answered by Ahmad T. • Chemistry tutor
37209 Views

If I put £500 in the bank with an annual interest rate of 3% how much money will I have earned in 2 years?

Too calculate this we need to increase to total amount of money in the bank by 3% year on year for 6 years. Year 0 £500 Year 1 £500 x 1.03 = £515 Year 2 £515 x 1.03 = £530.45 Notice we use the running total ...
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Answered by Ahmad T. • Maths tutor
10645 Views

How do I solve a quadratic equation by factorising?

A quadratic equation is one that includes x 2 as the highest power of x. Factorising is achieved in 3 steps. Let’s consider the example x 2 -3x-3=1 1) Put the equation into the form ax 2 +bx+c=0 x 2 -3x-4=02...
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Answered by Shannon G. • Maths tutor
5670 Views

What is the trend in first ionisation energy across a period?

Overall, the general trend is an increase across the period. The decrease in shielding (as outer electrons are less influenced by the nucleus) is outweighed by an increased nuclear charge and a decreased ato...
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Answered by Ben W. • Chemistry tutor
14028 Views