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Paha777 [63]
4 years ago
15

Ten interesting facts about radium and polonium

Chemistry
1 answer:
suter [353]4 years ago
3 0
1. They were both discovered by Marie and Pierre Curie.
2. They can both poison you.
3. Radium is named after the Latin word for "Ray"
4. Polonium is named after Poland, the country in which Marie Curie was born.
5. Marie and Pierre Curie obtained radium and polonium from pitchblende, a material containing uranium.
6. Polonium was discovered in 1898.
7. Radium was discovered in 1898 as well.
8. Radium and polonium are both elements on the periodic table.
9. Polonium is also called "radium F".
10. Both radium and polonium must be handled very carefully with good equipment, or their toxic fumes could spread and possibly be fatal.

Hope this helped! :)
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The Kinetic Energy is approximately 3 times decreased

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A baseball weighs 5.13 oz.  

a)What is the kinetic energy, in joules, of this baseball when it is thrown by a major league pitcher at 95.o mi/h?  

b) By what factor will the kinetic energy change if the speed of the baseball is decreased to 54.8 mi/h? Express your answer as an integer.

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b) KE=0.5×m×v^2

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