Top answers

Describe the difference between bonding in ionic structures and covalent molecules

Ionic structures form giant lattices with many electrostatic attractions between oppositely charged ions. Covalent molecules have strong covalent bonds involving a shared pair of electrons.
CD
Answered by Cam D. • Chemistry tutor
2755 Views

A body is moving at 70km/h and has a mass of 130kg, calculate its maximum kinetic energy.

Firstly, the speed is not given in SI units, this is modified by changing the units from km/h to m/s by the following relationship; 70km/h = (70000/3600)m/s. Once this is complete the equation for kinetic en...
JI
Answered by Joe I. • Physics tutor
3542 Views

A curve has equation y = e^x + 10sin(4x), find the value of the second derivative of this equation at the point x = pi/4.

Firstly, differentiate y with respect to x once to obtain the equation dy/dx = e^x + 40cos(4x). Then differentiate this resultant expression, with respect to x, to acquire a solution for (d^2)y/d(x^2) = e^x ...
JI
Answered by Joe I. • Maths tutor
3704 Views

Factorise the following equation: 2x^2 + 8x + 8

The first step in factorising is to look for a 'common factor'. A common factor is a number or letter that all the values have in common. All the integers (numbers) in this equation can be divided by 2. Ther...
EK
Answered by Ellen K. • Maths tutor
6548 Views

What is the difference between mitosis and meiosis?

Mitosis and meiosis are both ways that cell division can happen in humans. Mitosis produces two daughter cells that are genetically identical with the same number of chromosomes (diploid). Whereas, meiosis p...
AA
Answered by Aisha A. • Biology tutor
4161 Views