F Give reasons for the following statements.
1. Sound can not be heard on other planets
2. Speed of sound is higher on a hot summer day.
3. Sound needs material medium to propagate.
4. A train can be heard approaching from quite a distance away with the help of its tracks.
5. The concert halls are decorated with curtains.
Answers
Answer:
1
Explanation:
in vaccum sound cannot travel but we can hear other planet sounds with some special amd sensitive instruments
Answer:
1. sound can not be heard on other planets because other planets donot contain air /oxygen
2.bcz the velocity of sound in gas is directly proportional to the square root of its absolute temperature.therefore hot day is more than winter than for sound would travel faster in summer than cold winter day
3.sound needs a material medium for proportion like solid,liquid nd gaseous to travel bcz liquid nd solid nd gaseous carry sound to another nd sound cannot through waves bcz vaccum molecules which cannot be vibrated they don't carry the sound.
4.bcz sound can travel faster in solid.
5.they r done for better lighting of sound effect ..the carpets all around also prevents sound echo thus providing better sound.