ParaGuard is a small IUD that prevents pregnancy for up to 10 years using copper. Pregnancy is rare but can be life-threatening and cause infertility or loss of pregnancy. Tell your healthcare provider if you miss a period, have abdominal pain, or it comes out. It won't protect against HIV or STDs.
What is exit velocity? On this episode, Neil deGrasse Tyson and co-hosts Chuck Nice and Gary O’Reilly explore parabolas, measuring the speed of an object using the Doppler effect, and other physics in baseball.
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Photo Credit: Andrew nyr, CC BY-SA 4.0, via Wikimedia Commons
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