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What were the different roles of the Chinese Civil War and the Korean War in the start of the Cold War in Asia?

This is a brief essay-style introduction to the question, to ensure that an overall understanding is given while drawing the student's attention to the key points to make in a potential exam question:From...

Answered by Ben C. • History tutor

2922 Views

Explain the process of DNA replication an state why it is called semi-conservative.

During DNA replication, DNA helicase attaches itself to the double stranded DNA and breaks the hydrogen bonds between the 2 strands. Next, free nucleotides pair with complementary bases on each strand of ...

Answered by Akthar Hussain M. • Biology tutor

3080 Views

Why does an ionic compound (e.g. NaCl) conduct electricity when molten or dissolved in water, but not when it is a solid.

When an ionic compound is a solid, the ions in the ionic lattice are held together by ionic bonds. Due to this, the ions are not free to move around and so cannot carry a charge. When the ionic compound i...

Answered by Akthar Hussain M. • Chemistry tutor

4175 Views

Is the excitation and de-excitation of an electron from the ground state (of an atom) due to the collision of another particle (e.g. electron) an elastic collision or an inelastic collision.

It is an elastic collision. This is because, when a particle collides with the electron of an atom, a discrete amount of energy is transferred from the particle to the electron. This discrete amount of en...

Answered by Akthar Hussain M. • Physics tutor

2564 Views

Choose an example of a negative externality and explain one policy which may help to solve it.

Smoking, specifically tobacco, is an example of a negative externality in that it harms negatively those outside of the original transaction. For example, a person walking down a high street inhaling seco...

Answered by Sam B. • Economics tutor

2319 Views