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Given I climb two steps every second and I have a mass of 50kg, what is the power output of my legs in kilowatts? (3 significant figures)

(There is a diagram showing stairs with steps that are 20cm high) Power = Energy/TimeEnergy required to climb one step = Work Done = Force DistanceForce = Weight = m g = 50 9.81 = 490.5NEnergy = 490.5 0.2 = ...
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Answered by Toby G. • Physics tutor
2649 Views

Given the area of the pool is 63m^2, what is the value of x?

(There is a diagram showing a rectangle with one side labelled x+4 and another labelled x+6)Area = (x+4)(x+6)63m^2 = x 2 +10x+240 = x 2 +10x-390 = (x-3)(x+13) x-3=0 so x=3x+13=0 gives x=-13, which cannot be ...
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Answered by Toby G. • Maths tutor
3498 Views

What is the best way to plan a letter for a writing exam in Japanese?

Start with the name and addressThe traditional greetings and pleasantriesRespond to anything mentioned in the question. For example did they mention something about their family or ask you a question?In the ...
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Answered by Victoria L. • Japanese tutor
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If 9g of alumnium reacts with 35.5g of chlorine, what is the empirical formula of the compound formed?

Empirical formula The empirical formula is a formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms. To find this you require the mass used an...
BF
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What is an isotope?

Isotopes are atoms of an element with different numbers of neutrons. They have the same proton number, but different mass numbers. They have the same chemical properties, due to having the same number of ele...
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