1 Mark Questions Q1. Which sound has a higher pitch, guitar or car horn? Q2. Name three animals which can hear ultrasonic vibrations. Q3. How are the wavelength and frequency of a sound related to its speed? Q4. Why sound wave is called a longitudinal wave? Q5. Frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute? Q6. What is an echo? Q7.What do waves transport - matter or energy? Q8. What is a wave? Q9. Which characteristics of the sound help us to identify a person by his voice if he is sitting in a dark room? Q10. If the amplitude of a wave is doubled, what will be the effect on its loudness? 2 Marks Questions Q11. Which wave property determines a) loudness, b) Pitch? Q12. Why are the ceilings of concert halls curved? Q13. How is ultrasound used for cleaning? Q14. Sound is produced due to a vibratory motion, then why a vibrating pendulum does not produce sound? Q15. A sound produces 20 crests and 20 troughs in 0.4 sec. Find the frequenc
CBSE NCERT SOLUTION, STUDY MATERIAL, NOTES,CTET, SAMPLE PAPER, SCIENCE, PHYSICS, CHEMISTRY, BIOLOGY, CBSE QUESTION PAPER, SAMPLE PAPER, CBSE Syllabus; CBSE Model Papers; BOARD Exam PAPER; ONLINE STUDY HELP, STUDY MATERIALS, For CLASS 6 to 12, PDF FILE, YouTube VIDEO for lessons.