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Oak National Academy
12 questions
A car’s speedometer shows a speed of 20 miles per hour. What does this mean?
Which of the following describes the medium of a wave?
Which of the following can describe the motion of particles in sound waves?
Which of the following can sound travel through?
Which of the following statements about the speed of sound waves in solids, liquids and gases are correct?
Which of the following is the best definition of experimental errors?
Which of the following statements are correct?
A bird is flying at a constant speed. In 3.5 s, it travels 42 m. The speed of the bird is ___ m/s.
Two pupils use an echo method to measure the speed of sound in air. The diagram shows the arrangement. When should the pupil start and stop the timer?
Two pupils measure the speed of sound. The time between making a sound and hearing its echo from a wall 150 m away is 0.94 s. The sound speed they calculate, written to 2 s.f., is ___ m/s.
A ship uses sonar to find the distance to an underwater object, by measuring the time taken for sound to return after reflecting from the object. This technique, also used by dolphins, is called ___.
A sonar system on a ship sends out a sound wave and receives an echo 1.20 s later. How far away is the object, if the speed of sound in water is 1500 m/s?
