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Explain why there is a surplus of solar energy in tropical latitudes and a deficit towards the poles (4)

1. Curvature of the earth + Angle of Incidence - The suns angle in the sky decreases towards the poles due to the curvature of the earth , which spreads the heat energy over a larger surface area- The suns r...
KW
Answered by Katy W. • Geography tutor
7283 Views

How important was the use of fear in the achievement of Stalin’s economic policies?

During his time in power, Stalin reinforced a ‘cult of personality’ throughout Soviet Russia in order to push through his most radical economic reforms. Indeed, the cult was inaugurated during Stalin’s 50th ...
AG
Answered by Amber G. • History tutor
5168 Views

Solve x^2+7x+12=0

We need the equation in the form (x+a)(x+b)=0. The numbers in the brackets (a and b) must multiply together to get the constant at the end of the equation, in this case 12. The numbers (a and b) must add tog...
AS
Answered by Amy S. • Maths tutor
4306 Views

If fusing hydrogen nuclei together puts them into a lower energy state, and matter always wants to be in a lower energy state, then why hasn't all the hydrogen in the universe already done this?

We first need to look at why fusion of hydrogen nuclei results in a lower energy state. On the face of it, hydrogen nuclei are just protons, which all carry an equal positive electric charge. This means they...
CC
Answered by Callum C. • Physics tutor
2449 Views

A box is at rest on a slope with an angle ϴ. Find an expression for the static friction coefficient, μ, of the box.

Begin by drawing a diagram with all the vectors that act on the box. This should include the normal vector (N), the weight of the box (G), and the static friction force (F s ). Write down the equation for th...
OL
Answered by Oliver L. • Physics tutor
5154 Views