English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

3 answers

Radio waves, micro waves, radar, sonar, etc.

2006-10-23 06:18:33 · answer #1 · answered by FrogDog 4 · 0 0

Hi. Radiation. Plus sound.

2006-10-23 13:33:35 · answer #2 · answered by Cirric 7 · 0 0

Photons, or electromagnetic energy.

2006-10-23 15:10:38 · answer #3 · answered by Anonymous · 0 0

fedest.com, questions and answers