A key distinction between the United Nations and the League of Nations is that the League never had U.S. participation, which significantly impacted its effectiveness. The UN, in contrast, was built on broader participation and mechanisms for military intervention. Therefore, the appropriate answer is that the League of Nations never achieved U.S. participation. ;
The device delivering a current of 15.0 A for 30 seconds transfers a charge of 450.0 C. This corresponds to approximately 2.81 billion billion electrons flowing through it. The calculation involves using the relationship between current, charge, and time, along with the charge of a single electron.
;