I think that the speech was effective because it actually was addressing the issues of the Great Depression. It helped assured people that were suffering, and explained how the government will take action to help the people. It said, "This law also have authority to develop a program of rehabilitation of our banking facilities..." to prove that they are passing laws and making progress to fix important issues, such as the one that was occurring regarding banks. Roosevelt effectively addressed and explained the issue and made America's complaints feel heard as he also gave solutions to the issues. It's correct on e 2020 - 2021!
If you find a machine which goes in a speed of 3×10^8 m/sec, you can see the past and future. You can even travel for longer distant objects like stars