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# Tutor profile: Phillip W.

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Phillip W.
Former Australian Government. Teacher of 10 years
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## Questions

### Subject:Portuguese

TutorMe
Question:

Provide the plurals for the following words: - Empadão - Mulher - Homem - Gato

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Phillip W.

- Empadões (endings of -ão [aumentatives only] change to -ões for plurals) - Mulheres (plural is made by adding -es to the end of words ending in 'r') - Homens (replacing the 'm' and changing to 'ns' for words ending in 'm') - Gatos (simply adding an 's' to words ending in vowels that are aumentative)

### Subject:Applied Mathematics

TutorMe
Question:

Woronora dam has a current volume of 53,618 ML of water. The largest nuclear bomb (the Soviet 'Tsar Bomba') ever detonated has a yield equivalent of 50 megatons of TNT. One ton of TNT has the energy of 4.184 gigajoules. The heat capacity of water is 4.2 kilojoules per kilogram. Assuming 100% efficiency, How many degrees can the Tsar Bomba heat the Woronora dam?

Inactive
Phillip W.

The total energy output of the Tsar Bomba is 50,000,000*4.184 = 209,200,000,000 gigajoules To heat the Woronora dam up by 1 degree celsius requires 53,618,000,000*4.2 = 2,251,956,000,000 kilojoules or 2,251,956 gigajoules. The total energy output divided by the heat capacity of all of the damn provides how many degrees the bomb will heat the damn: 209,200,000,000/2,251,956= 92,897 degrees

### Subject:Chemistry

TutorMe
Question:

You have a cup of hot tea and you want to add your cold milk. You prefer your drink to be as cold as possible and will drink the tea in exactly five minutes. Do you add the milk now, or do you wait five minutes to add the milk?

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Phillip W.

You add the milk in five minutes. According to Newton's law of cooling, the rate of cooling is proportional to the difference in temperature. Hence, taking advantage of the large difference in temperature of that five minutes will provide a cooler drink.

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