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In the Rutherford alpha scattering experiment, most particles passed straight through the foil with little or no deflection. What can be deduced about the structure of the atom from this?

Answer: Most of the atom's mass must be concentrated in a small area at the centre of the atom. This is known as the nucleus.
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Answered by Megan R. • Physics tutor
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List and explain 2 theories of motivation, and give an example of how they can be applied in practice.

1. One theory of motivation is that suggested by Taylor, which asserts that employees are not motivated by anything but their remuneration. This can be applied through the introduction of a piece rate remune...
AM
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A solution of acetic acid and sodium acetate was prepared, by dissolving 4.1 g of sodium acetate in 750 cm^3 of 0.085 mol/dm^3 acetic acid, at 25 degrees. 10 Cm^3 of 2 mol/dm^3 HCl was added. Ka is 1.76*10^-5, calculate and explain the change in pH

The first thing to do in any calculations question is to list out what you have, and what the question is asking you. In this case, the question wants pH, which is -log[H+]. So what we need is [H+]. We have ...
AM
Answered by Alex M. • Chemistry tutor
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What are higher order functions in functional programming? How does the 'map' function work and why is it a higher order function?

Higher order functions either have one or more arguments that are themselves functions , return a function as their result, or both . Arguments to higher order functions can themselves be higher order functi...
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Answered by Joseph C. • Computing tutor
2388 Views

Describe the similarities and differences between haemoglobin and collagen.

Similarities:Both have a quaternary structure (consisting of more than one polypeptide).Both are found in animals (haemoglobin is found in blood and collagen is found in the muscles, skin, bones and tendons)...
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Answered by Shannon M. • Biology tutor
38996 Views