I believe, those two materials were bamboo and carbonized thread
After thousands of experiments, Edison realized that filaments made from carbonized bamboo could alst for more than 1200 hours. (while others probably only last for several days)
This invention made Edison really rich after he mass produce it in late 1800s
Answer:
<em>Stationary front Forms when warm and cold air meet and neither air mass has the force to move the other. They remain stationary, or “standing still.” Where the warm and cold air meet, clouds and fog form, and it may rain or snow. Can bring many days of clouds and precipi- tation.</em>
B..........................................
Yes they do check their site as well
