In free space, radio waves travel at the speed of light. In a material, such as co-ax cable, the speed is much lower, perhaps as low as 0.6 of the speed of light. Special arrangements may lower its speed even further.
radiowave+radiowave
radiowave+radiowave= radiation
void and electricity make radiowave
To make the cellphone you need to put radiowave and computer together (radiowave and computer)
radiowave+fier
Void + electricity
lightbulb+radiowave :D
Radiowave + lightbulb = tv
Void + electricity = Radio Wave
communicationRADARheating foodmedical heating therapyetc.
Radiowave + Fire = Lazer
Explain what a sheave