Vibrating body produces sound: Take a brass bell (bell used in Pooja room or in your school). Ring the bell and listen to the sound carefully. Now hold the bell tightly with your hand as shown in figure and ring it again.a) Do you hear sound from the bell ?b) Is there any change in the sound produced in the two situations?c) What do your hands feel when bell is ringing?d) Remove your hand and ring it again. Do you hear a different sound? Why?e) Fix a rubber band tightly on an empty matchbox. Pluck the rubber band and keep it close to your ear. Do you hear any sound? Do you feel any vibration in your hands?f) Blow air into papers of your notebook. What happens? Does the action produce any sound? Do you find any vibrations in the note book? (OR) If you blow air into papers of your notebook, sound will be produced.Write your observation in this activity.g) Fill a plate with water and let the water settle. Strike the rim of the plate with a spoon as shown in figure. What do you observe? What do you hear? Where do you find vibrations in this case?