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Describe briefly the nature of metallic bonding and use this to explain why metals are malleable (can be hammered into shape) and conduct electricity

Metallic bonding occurs as a result of the electrical attraction forces between the protons in the nuclei of the metal species and the delocalised electrons (which form a sea of electrons surrounding the ...

MA
13411 Views

Integral of 1/(x^3 + 2x^2 -x - 2)

Factorise denominator using the factor theorem giving - 1/(x+1)(x+2)(x-1) Use partial fractions to turn this into an easier form to integrate giving - 1/3(x+2) + 1/6(x-1) - 1/2(x+...

MO
Answered by Mojowo O. Maths tutor
9316 Views

A curve has the equation 2x^2 + xy - y^2 +18 = 0. (1) Find the coordinates of the points where the tangent to the curve is parallel to the x-axis.

Firstly notice that the coordinates of the points where the tangent to the curve is parallel to the x-axis are precisely the points where the rate of change of y with respect to x is not changing. That is...

OL
Answered by Oliver L. Maths tutor
8187 Views

Briefly explain the common types of erosion that shape a river from source to mouth

The first is Hydraulic Action. This is the force of the river against the banks causing air to be trapped in cracks and crevices. The pressure then weakens the banks and gradually wears it away. Secondly,...

JB
Answered by Joe B. Geography tutor
1492 Views

For Maths 11+. An Island on a map is measured to be 4cm across. The scale of the map is 4cm to 500m. How long is the island in km?

The island is 2km. If the scale is 1cm:500m we need to multiply both left and right sides by 4 to get to the 4cm that was measured. This gets us 4cm: 2000m . We now need to convert 2000m to km which gives...

DT
Answered by David T. Maths tutor
3098 Views

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