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Solve the simultaneous equations: 4x+5y = 38 , x-y = 5

Firstly number the two equations 1 and 2 for simplicity. To solve this we want to eliminate one of the variables, x or y, so we start by looking at the equations and seeing if we can add or subtract them fro...
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Answered by Ali A. • Maths tutor
4949 Views

What are the differences between aerobic and anaerobic respiration in animals?

Aerobic - requires oxygen, releases carbon dioxide and water, produces much more energy for the same amount of glucose. Anaerobic - doesn't require oxygen, releases lactic acid, much less efficient at produc...
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Answered by Musa A. • Biology tutor
18571 Views

Write a word equation for the reaction between lithium bromide and chlorine gas.

This is a displacement reaction as the more reactive halogen (chlorine) will displace the halide ion from the ionic compound (lithium bromide). This will result in the bromide being displaced and forming bro...
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Answered by Musa A. • Chemistry tutor
22608 Views

If Hannah slows down from a speed of 12 m/s to 8 m/s and has a mass of 45kg, how much force has been exerted on her to cause this deceleration?

Since force = mass x acceleration, acceleration = 4 as the change in velocity is 4 m/s and m = 45 as the mass of Hannah is 45 kg and hence the force required to be exerted on her is 4*45 which is 180N.
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Answered by Musa A. • Physics tutor
3053 Views

Was sind die Vor- und Nachteile der Technologie für Jugendliche?

Es gibt viele Vorteile der Technologie, zum Beispiel können Jugendliche SMS schicken, im Internet surfen, und Freunden anrufen. Außerdem benutzen viele Jugendliche Computers, um Hausaufgaben zu machen oder z...
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Answered by Katharine C. • German tutor
14693 Views