Joe S. A Level Physics tutor, A Level Maths tutor, GCSE Maths tutor, ...

Joe S.

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Degree: Physics (Bachelors) - Bristol University

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About me

Hi, my name is Joe Spilman I'm currently in my first year at the University of Bristol studying physics and I'm looking to tutor maths and physics, GCSE and A-level. I have come straight from sixth form where I studied A-levels in:

Physics  A*  -  AQA

Maths     A   -   "

Further Maths    A  -  "

If you're currently studying for your A-levels or GCSEs then it wasn't that long ago that I was in your position, I can imagine what a help some hindsight and first-hand experience would have been at the time. So if your looking to deepen your understanding of certain topics or just looking for some extra exam prep then drop me a message.

Looking forward to hearing from you

Joe

Subjects offered

SubjectLevelMy prices
Maths A Level £20 /hr
Physics A Level £20 /hr
Maths GCSE £18 /hr
Physics GCSE £18 /hr

Qualifications

QualificationLevelGrade
PhysicsA-LevelA*
MathematicsA-LevelA
Further MathematicsA-LevelA
Disclosure and Barring Service

CRB/DBS Standard

No

CRB/DBS Enhanced

No

Currently unavailable: for new students

Questions Joe has answered

How do I find the half-life of radioactive isotope?

The half-life of a radioactive isotope is the time taken for half of the atoms in a given sample of the isotope to decay. Radioactivity is random and so, half-life is the average time taken for a large number of atoms.  There are two ways to find the half-life, both come from the decay equatio...

The half-life of a radioactive isotope is the time taken for half of the atoms in a given sample of the isotope to decay. Radioactivity is random and so, half-life is the average time taken for a large number of atoms. 

There are two ways to find the half-life, both come from the decay equation:   N = N0e^(-λt)      which is an exponential relationship*. 

Where N is the number of atoms of the isotope left at time t and Nis the number of atoms when t =0. λ is known as the decay constant and is the probability that an atom will decay per unit time. If you are given the decay constant you may find the half-life T1/2 by setting N = N0/2 and rearranging to find t = T1/2. Or if you are given N and Nyou may find λ and follow the previous steps.

*Make sure you familiar with exponentials and logs before attempting this topic

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2 years ago

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