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What are different animal's cognitive limitations? How can we observe this in the wild?

There is obviously no black and white answer, but the study of behavioural ecology tackles this issue. Empirical studies in the animal's natural environment are more difficult but more rewarding to co...

Answered by Chris G. • Biology tutor

4829 Views

What is metallic bonding?

Atoms in a metal are arranged in a lattice formation. What is a lattice? Imagine a grid (squares on a sheet of graph paper for example) where there is a metal atom in each sq...

Answered by Luke T. • Chemistry tutor

11362 Views

Explain what is meant by a semi-fixed exchange rate? With reference to the BBC news story in the link below, explain why the Nigerian central bank increased interest rates and devalued their currency (the naira)?

http://www.bbc.co.uk/news/business-30196496

An exchange rate is the price of one currency in terms of another. When this rate is semi-fixed the exchange rate is allowed to ...

Answered by Owen C. • Economics tutor

15120 Views

How do you find the cube root of z = 1 + i?

Firstly we express z in polar form:

z = Reⁱθ

where |z| = (Re² + Im²)^0.5= (1² + 1²)^0.5 = 2

Answered by Aldwyn E. • Further Mathematics tutor

18371 Views

How do you calculate the Earth's escape velocity?

The escape velocity is the speed that an object must have in order to have enough energy to escape the Earth's gravitational field. To calculate the escape velocity, we can apply the principle of Conserva...

Answered by Aldwyn E. • Physics tutor

23402 Views