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People continue to live close to active volcanoes for many reasons. For example, people still live close to Mount Vesuvius in Italy because of the fertile soil that is found on the slopes of the volcano. ...
Going down group 1 the period number increases. This means the number of shells increases, leading to a decrease in electrostatic attraction between the positive nucleus and outer most electrons. This wea...
Using the equation V=V0e-t/RC where RC is the time constant to be calculated: We know that the pd decreases by 80%, therefore the pd remaining, V is 0.2*V0. Putting this i...
The first step is to recall the formula for arithmetic progressions: u(n) = a + (n-1)d We can then put all the information given in the question into this so u(12) = 66.5 = a + 11d and u(19) = 98 = a ...
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