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How do earthquakes occur?

Earthquakes are caused by the breakage of underground, crustal rock largely close to or near plate boundaries. It should also be noted that the breakage of rock occurs along a fault line, which is a long ...

LH
Answered by Lauren H. Geography tutor
4632 Views

Why do large organisms need specialised exchange systems and what are the features of an efficient exchange surface?

Large organisms have-High metabolic activity (used in movement, respiration, reproduction etc)Large distance between cells and the incoming oxygen that they requireA very small surface area to volume rati...

AJ
Answered by Abigail J. Biology tutor
10580 Views

What is the standard enthalpy change of formation and how does it differ from the standard enthalpy change of reaction?

The enthalpy change of formation is the enthalpy change when 1 mole of a compound is formed from its constituent elements in their standard states. Meanwhile the enthalpy change of reaction is the enthalp...

AJ
Answered by Abigail J. Chemistry tutor
2597 Views

What is the use of membranes within the cell?

Membranes within the cell are used in compartmentalisation for numerous reasons- one being to allow processes to occur separately in different organelles without interacting and affecting other processes,...

AJ
Answered by Abigail J. Biology tutor
2323 Views

What is a standard electrode potential?

The EMF voltage produced when a half cell is connected to a standard hydrogen half cell under standard conditions. Standard conditions are 298 Kelvin, 100 kPa, and all solutions must be in 1 moldm-3 ...

AJ
Answered by Abigail J. Chemistry tutor
1898 Views

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