You must have: Total Marks
Calculator, ruler, Equation Booklet (enclosed)
Instructions
• Use black ink or ball-point pen.
• centrethe
Fill in boxes at the top of this page with your name,
number and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.
Information
• The total mark for this paper is 100.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• structure
In questions marked with an asterisk (*), marks will be awarded for your ability to
your answer logically, showing how the points that you make are related
or follow on from each other where appropriate.
• A list of equations is included at the end of this exam paper.
Advice
• Read each question carefully before you start to answer it.
• Try to answer every question.
• Check your answers if you have time at the end. Turn over
, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
answer, put a line through the box and then mark your new answer with a cross .
1 Figure 1 shows a bat and its prey.
not to scale
bat prey
Figure 1
The bat emits a high frequency sound pulse to locate its prey.
The speed of sound in air is 330 m / s.
(a) The wavelength of the sound is 11 mm.
Calculate the frequency of the sound.
(2)
Use the equation
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