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Sodium chloride and sodium metal can both conduct electricity under differing conditions. Give the conditions required for each to conduct electricity and explain how each conducts electricity.

Sodium chloride will conduct electricity only when it is in a liquid state or in solution, this is because the ions are free to move in this state, allowing them to carry charge and conduct electricity. Sodi...
TJ
Answered by Tanmayi J. • Chemistry tutor
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Find the equation of the tangent to the curve y^3 - 4x^2 - 3xy + 25 = 0 at the point (2,-3).

This is an example of implicit differentiation where we have to consider both the y-terms as well as the x-terms. The first step is to deal with each term on the left hand side individually. This gives us 3y...
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Answered by Tanmayi J. • Maths tutor
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You will have studied a recent earthquake event. To what extent is this location likely to be well prepared for an earthquake in the future? Explain your answer fully using specific detail. 6 marks.

The magnitude 7 earthquake that hit the LEDC central American country of Haiti on the 12th January 2010 is an event that one could argue highlights how the country is not sufficiently prepared for future ear...
AC
Answered by Andrew C. • Geography tutor
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Joan cycles from her house to a shop 900 m away. She then cycles to her friends' house 700 m away. The average speed for the first part of her journey is 2 m/s. The second part takes her 16 mins. What is the average speed for her entire journey?

S: 900 700D: 2 m/sT: 960s Need to find speed in seconds so convert 16 mins to seconds. To find average, we must find time for the first part. Using the basic D/S, the time is 900/2 = 450 s.Speed for the seco...
AR
Answered by Aisha R. • Maths tutor
3272 Views

Differentiate with respect to x: (6x + 7)e^x

Product Rule: dy/dx (uv) = u'v + uv' Let u = 6x+7 and v = e^x. Using simple disintegartion, u' is 6 and v' is e^x. Therefore, answer is: 6e^x + (6x +7)e^x
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Answered by Aisha R. • Maths tutor
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