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How do I work out the exact value of a number which is expressed as an indice, for example 81^-1/4

Firstly, recall the indice rules which are applicable to the question, for example in this question we can use the rules:(x^a)^b = x^abx^-1 = 1/xx^1/2 = square root xSecondly, apply these rules to break d...

CH
Answered by Cameron H. Maths tutor
2883 Views

State and explain how the attraction between nuclei and outermost electrons varies across group 3 (2 marks)

Attraction between the nucleus and the outer electrons increases across a group because the proton number increases and the atomic radius decreases due to increased nuclear charge.Across a group shielding...

AD
Answered by Amy D. Chemistry tutor
9952 Views

To what extent was the legacy Treaty of Versailles the main cause of the Second World War?

Thesis - The legacy and impact of the Treaty of Versailles was the main cause of the WWII, since it set the precedent for a following conflict. Despite this, the failure of collective security, the econom...

VS
Answered by Vinicius S. History tutor
1755 Views

Why does anaerobic respiration have a lower ATP yield than aerobic respiration? (4 marks)

During anaerobic respiration only glycolysis can occur as oxygen is not present to act as the final electron acceptor in oxidative phosphorylation, therefore only substrate level phosphorylation can occur...

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Answered by Amy D. Biology tutor
7872 Views

Calculate the threshold wavelength for a metal surface with work function of 6.2 eV.

threshold wavelength where photoelectrons have no energy, i.e. Work function = hc/wavelength.Rearrange for wavelength and substitute. Wavelength = 2*10^-7 m.

DP
Answered by Daniel P. Physics tutor
15701 Views

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