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A Level

State the conditions by which a Poisson distribution model may be suitable for a given random variable X.

The events recorded by X occur randomly, independently, singly in space and time and at a constant average rate (an average (mean) rate proportional to the length of the interval).

KC
2311 Views

Image a graph. In which instances is it more appropriate to use an adjacency list instead of an adjacency matrix?

There are two criteria that usually determine whether we use an adjacency list or an adjacency matrix?a. The size of the graph and the number of edges. If the graph has a very big number of nodes but has ...

CB
Answered by Calin B. Computing tutor
1850 Views

Describe how you would differentiate a sample of butanal and butan-2-one.

You would add tollen's reagent to both samples. The butanal would form a silver mirror, whereas, butan-2-one would remain unchanged. This is due to the fact that an aldehyde can be oxidised to a carboxyli...

Answered by Chemistry tutor
15954 Views

Que savez-vous de l'histoire du cinéma français?

Given that this is an oral question, there isn't time to prepare in the exam itself. However, these questions follow certain formats which, when learned, make it much more manageable. The first thing to o...

Answered by French tutor
2673 Views

The Haber process is used to manufacture ammonia. Explain the optimum conditions for this reaction and why these conditions may not be used in industry

N2(g)+3H2(g) ⇋ 2NH3(g) ΔH=-92kJmol-1 (equation for question above)
According to Le Chatelier's principle, a system in dynamic equilibrium will shift th...

LA
Answered by Luke A. Chemistry tutor
6142 Views

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