£24 - £26 /hr

Elizabeth R.

Degree: Computer science and Physics (Bachelors) - Durham University

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#### Subjects offered

SubjectLevelMy prices
Computing A Level £26 /hr
Maths A Level £26 /hr
Physics A Level £26 /hr
Computing GCSE £24 /hr
German GCSE £24 /hr
Maths GCSE £24 /hr
Physics GCSE £24 /hr

#### Qualifications

MathematicsA-LevelA*
GermanA-LevelA
PhysicsA-LevelA
 CRB/DBS Standard ✓ 12/02/2015 CRB/DBS Enhanced No

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#### Ratings and reviews

4.8from 58 customer reviews

Navneet (Parent) May 18 2017

Brilliant tutorial as always.

Navya (Student) February 16 2017

Explained and went through everything really well

Navneet (Parent) February 2 2017

Excellent tutorial as always. She explained the topics very well to Navya.

Navneet (Parent) December 22 2016

She explained each topic that was covered in depth and provided questions for more revision
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### A stationary observer Bob, observes Alice take 5 seconds to travel from point A to B at 0.95c. How much time does Alice measure the journey from A to B to take?

This question is all about the application of Special Relativity.  In order to solve this problem we need to identify that the correct equation to use here is: t= (gamma factor)t0 Where t is the time observed by Bob, t0 is the time observed by Alice and the gamma factor = 1/Sqrt(1-(v2/c2) W...

This question is all about the application of Special Relativity.

In order to solve this problem we need to identify that the correct equation to use here is:

t= (gamma factor)t0

Where t is the time observed by Bob, t0 is the time observed by Alice and the gamma factor = 1/Sqrt(1-(v2/c2)

We need to rearrange the equation for t0, giving

t0=t/(gamma factor)

t0= t(Sqrt(1-(v2/c2))

Subsituting t =5 s, v = 0.95c, we obtain:

t0=(5 s)(Sqrt(1-0.952))

t0 = 1.56 s

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1 year ago

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