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One of the decays of potassium (A=40, Z=19) results in an excited argon atom with excess energy of 1.50 Mev. In order to be stable, it emits a gamma photon. What frequency and wavelength has this gamma photon?

The nucleus of the atoms are usually in excited states after performing a beta decay. By emitting a photon, the nucleus recover stability. The emitted photon has the same energy as the excess energy of the e...
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Answered by Marcos S. • Physics tutor
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Evaluate the view that all firms are aiming to maximise profits

Profit maximisation is an objective of a firm that seeks to produce output where Marginal Cost is equal to Marginal Revenue. Therefore, it is assumed rationally that this would be the most important objectiv...
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Answered by Daniel D. • Economics tutor
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When do I use SER and when do I use ESTAR?

Firstly, ser and estar both mean 'to be'. When followed by a gerund, we always use estar . Eg: "La chica está cantando" The choice of the verb depends on many factors, mainly whether the adjective ...
LV
Answered by Lauren V. • Spanish tutor
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Explain how meiosis promotes genetic diversity

Meiosis occurs to produce haploid gametes required for sexual reproduction. It promotes genetic diversity in 3 different ways: crossing over, independent assortment and random fertilisation.Crossing over occ...
JA
Answered by James A. • Biology tutor
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How far do you agree that the Heath government was unsuccessful because of circumstances out of its control?

One argument in favour of Heath’s governments failure being down to unpopular policies was the Industrial Relations Act of 1971. Heath wanted to curb the power of the unions by introducing measures that woul...
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Answered by Billy T. • History tutor
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