What are three things that transfer energy by sound

Which would not reduce the amount of green house gasses in the air

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?