Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel
International
Advanced Level
Thursday 24 October 2019
Morning (Time: 1 hour 20 minutes) Paper Reference WPH13/01
Physics
Advanced Subsidiary
Unit 3: Practical Skills in Physics I
You must have: Total Marks
Scientific Calculator, ruler
Instructions
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page with your name,
centre number and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.
• Show all your working in calculations with your answer clearly identified at
the end of your solution.
Information
• The total mark for this paper is 50.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• The list of data, formulae and relationships is printed at the end of this booklet.
Advice
• Read each question carefully before you start to answer it.
• Try to answer every question.
• your answers if you have time at the end.
Check
1 A teacher demonstrated echolocation to her students. The teacher made a loud sound and
an echo returned from a distant building as shown in the diagram.
s
building
The teacher and five students stood a distance s from the building. Each student
measured the time t between hearing the sound and hearing the echo.
(a) State one source of uncertainty in the values of t measured by the students.
(1)
(b) The table shows the values recorded by the five students.
Student 1 2 3 4 5
t/s 0.88 0.87 0.91 0.75 0.88
The students suggested that they should include in their calculations all the values of t.
The teacher suggested the value recorded by student 4 should be discarded.
(i) Explain why both of these suggestions are reasonable.
(4)
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