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There is a quarter circle with radius 8cm, what is the area of the quarter circle. The answer should be given in terms of pi, units are cm^2.

The area of a circle is given by the equation: A = pir2 where r is the radiusThis means the area of the quarter circle is just 1/4th the area of the total circle.Therefore the a...

SC
Answered by Shrey C. Maths tutor
6687 Views

How does antibiotic resistance arise?

Bacteria replicate by binary fission, at a rate of up to one division every 20 minutes. This replication results in genetically identical daughter bacteria to the original, however with each round of geno...

IT
Answered by Izzy T. Biology tutor
1768 Views

explain the relationship between resistance and voltage in a filament lamp

As voltage increases across the filament, the current also increases. The increase in current causes the temperature in the filament to rise. The increase in temperature causes the resistance within the f...

WP
Answered by William P. Physics tutor
12300 Views

3 teas and 2 coffees have a total cost of £7.80 5 teas and 4 coffees have a total cost of £14.20 Work out the cost of one tea and the cost of one coffee.

3t + 2c = 7.80 ---> x2 to get 6t + 4c = 15.605t + 4c = 14.20 6t + 4c = 15.60-- 5t + 4c = 14.20= 1t = 1.40If t = 1.40 substitute t in to the equation to get:(3 x 1.40) + 2c = 7.80 ---> 2c = 3.60 --&g...

HK
Answered by Hania K. Maths tutor
2362 Views

How does an increase in concentration affect the rate of reaction

An increase in concentration increases the rate of reaction because there are more particles in the same volume. This m...

HK
Answered by Hania K. Chemistry tutor
1934 Views

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