What has a positive charge a comb or an elastic band? why?

If steel is more dense that lake water, why can a boat float

Acold front traveling southeast collided with a warm front traveling northwest the following map shows the weather on monday the day the two fronts collided which of these describes the weather forecast for mississippi on tuesday and wednesday

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine