Question

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4. What did Einstein call his desk drawer at the patent office? Why?
Why did Finstein write a letter to Franklin Roosevelt?​

Answer 1

Einstein called his desk drawer at the patent office the “bureau of theoretical physics” because it was the place where he used to store his secretly developed ideas.

Answer 2

Hey mate here's your answer -:

4. Einstein called his desk drawer at the patent office as 'Bureau of Thoeretical Physics' because it kept him updated with latest physics news.

5. Einstein wrote a letter to Franklin Roosevelt as he already knew the power of atomic bomb being created by the Nazi's. So, he wrote a letter to warn Franklin Roosevelt.