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Referring to volcanoes, explain three reasons why fewer deaths are caused by this hazard than in the past. (6 marks)

Firstly, improved monitoring of volcanoes can reduce the death toll of an eruption by leading to enhanced predictions of hazard events and thus providing a longer period for the evacuation of vulnerable i...

Answered by Geography tutor
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Solve the equation log2(x + 3) + log2(x - 3) = 4

log2(x + 3) + log2(x - 3) = 4log2 [(x + 3)(x - 3)] = 4x^2 - 9 = 16x^2 = 25x = 5

Answered by Maths tutor
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Explain why transition metals form coloured compounds when bonded to a ligand.

The transition metals have five distinct orbitals in their third energy level. When bonded to a ligand these orbitals are separated into two groups located at two slightly different energy levels. The dif...

Answered by Chemistry tutor
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Describe how water is carried by the transpiration stream (7)

Transpiration is the water loss from the plant via evaporation. The transpiration stream is the flow of water through the plant xylem from the roots to the leaves of the plant. Xylem are thin tubes where ...

Answered by Biology tutor
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IB History question (topic: Cold War (paper II)): To what extent was the United States responsible for the collapse of the Grand Alliance at the end of the Second World War?

The US could be seen as responsible for the collapse of the Grand Alliance because it dropped the A bomb on Japan (1945) without first informing the Soviets, published the Kennan telegram (1946) and openl...

Answered by History tutor
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