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Why does atmospheric pressure drop when altitude increases?

(Question can be sketched with a graph) Firstly, in order to have atmospheric pressure, air molecules must collide with a surface, in this case the face of the Earth. As you gain altitude (height from fac...

HS
Answered by Henry S. Physics tutor
2943 Views

Given that: 2tanθsinθ = 4 - 3cosθ , show that: 0 = cos²θ - 4cosθ + 2 .

Starting with: 2tanθsinθ = 4 - 3cosθ . We can rewrite tanθ in terms of sinθ and cosθ.We know: tanθ = sinθ ÷ cosθ .By substituting we get: 2(sinθ ÷ cosθ)sinθ = 4 - 3cosθ .Let's multiply out by cosθ to get:...

HS
Answered by Henry S. Maths tutor
4956 Views

Write 9sin(x) + 12 cos(x) in the form Rsin(x+y) and hence solve 9sin(x) + 12 cos(x) = 3

9sin(x) + 12 cos(x) = Rsin(x+y) =R(sin(x)cos(y)+cos(x)sin(y))= (Rcos(y))sin(x) + (Rsin(y))cos(x)Therefore by matching the coefficientsRsin(y)=12, Rcos(y)=9 [1]SoRsin(y)/Rcos(y) = 12/9 = 4/3, therefore tan...

JH
Answered by James H. Maths tutor
5450 Views

Translate the following passage into Spanish: When I was young, I used to visit my granddad every Friday. One day, I visited him with my mum. We drank coffee and watched the football. There isn't much to do in my granddad's house.

Cuando era pequeñ@, yo visitaba a mi abuelo cada viernes. Un día, lo visité con mi madre. Bebimos cafe y vimos el fútbol. No hay mucho que hacer en la casa de mi abuelo.

AG
Answered by Anna G. Spanish tutor
2236 Views

Explain what is meant by a Liberal Democracy

Free and fair elections- Rousseau, social contractchecks and balances/ separation of powers- jeffersonpotential to talk about constitutionalism - could use Madison as a thinker/-Beetham- argued that for a...

FL
Answered by Freya L. Politics tutor
1814 Views

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