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How does the heart pump blood through the chambers of the heart to then send it round he body?

Firstly the heart is myogenic, thereofore is controlled by the autonomic nervous system hence doesnt require conscious control. The pumping mechanism of the heart begins with stimulation of the Sinoatrial no...
KB
7427 Views

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
7694 Views

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
18851 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
5707 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
49331 Views