Given the age of the meteorite is 4.5 billion years old with 78 atoms of lead-206 the answer should be B. 156. The half-life of uranium-238 in order to decay into lead-206 is 4.46 billion years, which means that the original number of atoms is 156.
Answer:
When the average kinetic energy of the molecules goes up (a rise in temperature), the average speed of the molecules increases. And lower average kinetic energy of the molecules means they have lower speed.
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The two differences you see when comparing the four chambers of the heart is that the arteries have a thicker wall and veins have thin walls and that the arteries carry oxygenated blood away from the heart which means they get more pressure than veins.
what's the question?I am confused is that the question or a statement
Answer:The epiphyseal of the boy's long bones have closed
Explanation: Epiphyseal plates is a part of a long bone,were new bone growths take place. Puberty is the transitional period from childhood to adulthood,through the development of sexual characteristics. In early puberty the height of a child increase,this is called growth spurt. This growth spurt may decrease in late puberty after epiphyseal fission in late puberty,that is, after growth plate closure in late puberty.
