It’s Whaddya Wanna Know Wednesday, and Kai Ryssdal and Kimberly Adams are answering your questions, including one from a listener who wonders what the Fed reducing its balance sheet means for mortgage rates. We also dig into what it takes to harness tidal power, and why it’s not a bigger source of renewable energy.

Here’s everything we talked about on the show today:

• “To understand the Fed’s bond-buying dilemma, picture a lake” from Marketplace

• “Hamsterkauf! Coronazeit! There’s a German Word for Your Pandemic Experience” from Slate

Do you have a question for Whaddya Wanna Know Wednesday? Send a voice memo or email to makemesmart@marketplace.org, or leave us a voicemail at 508-U-B-SMART (508-827-6278).

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