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Describe the formation of a waterfall?

They occur where a band of hard rock (e.g. granite) overlies a softer rock (e.g. sandstone). Erosion processes such as Hydraulic Action (the force of the water) and Abrasion (where the river rubs stones that...
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Answered by Fleur M. • Geography tutor
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What is transcription?

Transcription is the process of sections of DNA being converted into mRNA (messenger RNA) that occurs in the nucleus of a cell. DNA is made up of a template strand and a coding strand which are complementary...
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Answered by Carolina M. • Biology tutor
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How can you tell if a reaction is endothermic or exothermic? Describe a way of determining if a reaction is exothermic or endothermic using simple laboratory equipment.

Exothermic and Endothermic reactions refer to if the change in Enthalpy of a reaction is negative or positive respectively. If a reaction is exothermic that means that enthalpy change is negative and heat is...
TF
Answered by Tom F. • Chemistry tutor
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How can I predict the shape of complex ions from their formulae?

Complexes are formed through ligand binding (donation of a pair of electrons to the central metal atom), and the shape of the complexes is usually determined by steric factors - or how the ligands can arrang...
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Answered by Tom F. • Chemistry tutor
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What is the coefficient of x^2 in the expansion of (5+2x)^0.5?

We the answer in question in the form A(1+B) 0.5 and we can do that by factorising out the 5. This gives 5 0.5 (1+0.4x) 0.5 . 2. Identify the formula we are going to use and put in the numbers from this equa...
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Answered by Akinmi A. • Maths tutor
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