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Figure 1 shows a sector AOB of a circle with centre O and radius r cm. The angle AOB is θ radians. The area of the sector AOB is 11 cm2 Given that the perimeter of the sector is 4 times the length of the arc AB, find the exact value of r.

theta/2pi x2pi r = length of ABso therefore simplifying gives... theta r = AB Perimeter = 2r+theta requate the answer of 4 AB to the perimeter.Solve for theta which eventually give 2/3then put theta in the e...
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Answered by Tutor460124 D. • Maths tutor
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Outline the reasons for which the charge that ‘he must tax food’ was problematic for Chamberlain’s Tariff Reform campaign?

Chamberlain’s contentious commitment to Tariff Reform in 1903 dominated cross party debate and national political discussion in the years that followed. In his speech at Glasgow , the consequences of propose...
Answered by • History tutor
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What are the principal parts of the verb γιγνωσκω?

γιγνωσκω - γνωσομαι - ἐγνων - ἐγνωκα - ἐγνωσμαι
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Write a 90 word summary of the following passage.

I can use the example exam questions from a revision guide to demonstrate the most effective way to go about answering this question. I would offer my tips on reading the question effectively to show how bes...
Answered by • French tutor
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A 25 cm3 sample of an unknown concentration of sulfuric acid was titrated against 0.1 mol dm-3 sodium hydroxide. The average titre was 20 cm3. Calculate the concentration of the sulfuric acid.

Balanced equation: H 2 SO 4 + 2NaOH → 2H 2 O + Na 2 SO 4 moles of NaOH = c x v = 0.1 mol dm -3 x (20/1000) dm 3 = 0.002 molStoichiometry: H 2 SO 4 :NaOH = 1:2moles of H 2 SO 4 = (0.002 mol)/2 = 0.001 molc=n/...
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Answered by Joseph K. • Chemistry tutor
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