34. What is sound? How does the speed of sound vary from medium to medium? 95. How are sound wave and light wave different from each other? 36. Mention some methods to conserve electricity at home and at school,
Answers
Answer:
ANS=sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain. ... Sound waves below 20 Hz are known as infrasound
Answer:
In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain. ... Sound waves below 20 Hz are known as infrasound.
Light waves are electromagnetic waves while sound waves are mechanical waves. Light waves are transverse while sound waves are longitudinal. ... Light waves can be polarized, but sound waves cannot. Light waves travel much faster than sound waves.
saving electricity into a group project. ...
At the end of each school day, turn off all computers and screens. ...
Replace all traditional light bulbs with energy-saving ones. ...
Maximize natural lighting by controlling the blinds and lights.