Answer:
(i) Cost of operating airlines is very high and so freight cost is very high as compared to sea transport.
(ii) It is difficult to carry bulky, awkwardly shaped goods.
(iii) Very risky in case of accident.
(iv) It is controlled by climatic conditions; thus bad weather leads to uncertainty in its time table.
No specific person was credited with naming Vega and Rigel.
Weakness
1. No taxes
2. No national military
3. State tarrifs
Strengths
1. No high ruler
2. Congress was the most powerful
3. Any Canadian was allowed into the Union
Significance of the Northwest Ordinance
Allowed territories to enter the Union
