Sound waves : Physics revision test paper

Q1.  SHORT ANSWERS QUESTIONS :                                       (05 MARKS)

1. Wave used by astronauts for communication in space ?
2. Why Sound waves are called mechanical waves?
3. Aircrafts flying at speed higher then speed of sound are known as ?
4. What should an object should do produce sound ?
5. Nomenclature for waves containing : i) Crest & trough ii)compression and rarefractions

Q2.  An explosion carried out in a vacuum is visible to a human being but is not audible. Why? 

                                                                                                                                                             (02 MARKS)

Q3.  What is sound wave? Define their types along with the proper diagram.  (05 MARKS)

Q4.  Define the following terms :                                                                                            (10 MARKS)

1. Wavelength
2. Time period
3. Amplitude
4. Supersonics
5. Crest & Rarefraction

Q5.    A sound wave has a frequency of 2 kHz and wave length 35 cm. How long will it take to travel 1.5 km?

                                                                                                                                                          (04 MARKS)

Q6. A ship sends out ultrasound that returns from the seabed and is detected after 3.42 s.

If the speed of ultrasound through seawater is 1531 m/s, what is the distance of the seabed

 from the ship?                                                                                                                     (04 MARKS)