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Describe what red shift is and why i provides evidence for the Big Bang Theory.

Red-shift is the increase in wavelength emitted from distant objects moving away from the observer, making them appear more red.The Big Bang Theory states that the universe began from a singularity which ...

Answered by Robert D. • Physics tutor

2826 Views

The perimeter of a right-angled triangle is 72 cm. The lengths of its sides are in the ratio 3 : 4 : 5. Work out the area of the triangle.

So, working out the different side lengths of the triangle is going to help find the area at the end. We split the ratio up into 3s and show them as a proportion of the whole perimeter. For example, one s...

Answered by Roberto G. • Maths tutor

9683 Views

The curve C has the equation: 16y^3 +9x^2y-54x=0, find the x coordinates of the points on C where dy/dx = 0

C: 16y³ + 9x²y -54x = 0 d/dx(16y³) + d/dx(9x²y) + d/dx(-54x) = d/dx(0).............=>48y².dy/dx + 9x².dy/dx + y.18x - 54 = 0 dy/dx(48y<...

Answered by Elliot P. • Maths tutor

8955 Views

A person swims from a depth of 0.50 m to a depth of 1.70 m below the surface of the sea. density of the sea water = 1030 kg/m^3 gravitational field strength = 9.8 N/kg Calculate the increase in pressure on the swimmer. Give the Unit.

ΔP = Δh ρ g
Δh = 1.7 - 0.5 = 1.2 m ρ = 1030 kg/m³g = 9.8 N/kg
ΔP = 1.2 (m) x 1030 (kg/m³) x 9.8 (N/kg)
= 12,112.8 N/m² = 12,112.8 Pa

Answered by Elliot P. • Physics tutor

8107 Views

‘Germany was treated fairly at Versailles.’ How far do you agree with this statement? Explain your answer.

In history, answers have less to do with the actual content and more to do with how essays are structured. I have therefore given the structure which I would provide to a student at GCSE level and explain...

Answered by Henry J. • History tutor

3370 Views