Question

pls give all answer.

Answer 1

Answer:

1)air

2) a

3) d

4) b

Explanation:

i hope it helps u

Answer 2

• To and fro motion of an object: Vibration
• Sound is produced by: Vibrating objects only
• Correct Option regarding good fuel: Ignition temperature above room temperature
• The natural solid fuel is: Charcoal
• Combustion of object releases: Heat and light
• Hottest Zone of candle: Blue zone
• Sound Travels the fastest in: Water
• The audible range of frequency: 20-20000Hz
• Which voice is likely to have less frequency: Women
• which characteristic of sound depends on the amplitude of vibration: Loudness

This is for the mcq ones

Ask for others separately i will answer them