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How do I calculate the gradient of a linear (straight) graph?

To find the gradient of a straight line we can use the change in the X and Y directions. The gradient (Slope) of a straight line is defined as : ​Grad = (Change in Y) / (Change in X) This is the basis of a v...
NA
Answered by Nathan A. • Maths tutor
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Describe and explain the trend in reactivity of the alkali metals (Group 1)

Reactivity increases down the group. The number of electron shells increases down the group. Therefore the outer electron is further away from the nucleus. Consequently, the attraction between the outer elec...
EJ
18921 Views

The price of a book is £4. In a sale the price is reduced by 30%. Work out the sale price.

The full price (100%) is £4The sale price is 30% less. So the sale price is 70% of the original price.£4 * 0.7 = £2.80
EJ
Answered by Elakkeya J. • Maths tutor
5741 Views

Describe what happens to copper ions during electrolysis of copper sulphate.

Copper ions are positively charged. So they are attracted to the negative electrode. The negative electrode is called cathode.At the cathode, each copper ion gains two electrons. They are said to be reduced ...
EJ
49511 Views

Describe how animals and plants are adapted to survive in dry conditions such as deserts.

Animals Have large surface area to increase loss of heat by radiation, which allows the animal to keep cool. Have reduced body fat. Body fat acts as an insulating layer preventing loss of heat from the body....
EJ
Answered by Elakkeya J. • Biology tutor
60474 Views