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If an alpha particle (Z = 2) of kinetic energy 7 MeV is incident on a gold nucleus (Z = 79), what is its closest distance of approach?

In Rutherford Scattering, an incident particle will reach the closest distance of approach when it is on a collision course head on with the target nucleus. At the closest distance of approach, the alpha ...

RN
Answered by Robert N. Physics tutor
4511 Views

When is the subjunctive mood used in French?

At A-level, students will be expected to be able to confidently use the subjunctive mood.
With a student, I would first discuss with them what the already know about the subjunctive, or any phrases t...

LS
Answered by Laura S. French tutor
2052 Views

Prove that ∑(1/(r^2 -1)) from r=2 to r=n is equal to (3n^2-n-2)/(4n(n+1)) for all natural numbers n>=2.

To prove the above statement we will be using proof by induction as this is the easiest way to prove that the statement holds for all natural numbers n>=2. Firstly, when proving by induction there are ...

SP
4108 Views

Give a definition/explanation for the term 'phenotype'

A phenotype is the expression of the genetic constitution of an organism and how it interacts with the environment.

FS
Answered by Frankie S. Biology tutor
2715 Views

Which of these nucleotide bases is NOT present in RNA: Cytosine, Thymine, Guanine, Adenine, Uracil

The correct answer is: Thymine.The four bases found in DNA molecules are Cytosine, Guanine, Adenine and Thymine but in RNA molecules, the Thymine base is replaced by Uracil.

FS
Answered by Frankie S. Biology tutor
23014 Views

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