The Federal Research Public Access Act is a law that says research papers that are paid for with tax money need to be available for everyone to read for free. You know how your mom and dad pay for things like roads and schools with their taxes? The government also gives money to scientists to do research on things like how to keep us healthy, how animals behave, and how the Earth's climate is changing. When these scientists finish their work, they write a paper about what they found.
Now, before this law was passed, some research papers would cost money to read. This means that only people who had lots of money could read them. But the government thought that everyone should get to read these papers because the government paid for them with your mom and dad's taxes. That's why they passed the Federal Research Public Access Act.
So now, when scientists finish their research papers, they have to put them online where everyone can read them for free. This way, even you can learn about cool science stuff without needing to pay lots of money.