Answer:
After 5 second 25% C-15 will remain.
Explanation:
Given data:
Half life of C-15 = 2.5 sec
Original amount = 100%
Sample remain after 5 sec = ?
Solution:
Number of half lives = T elapsed / half life
Number of half lives = 5 sec / 2.5 sec
Number of half lives = 2
At time zero = 100%
At first half life = 100%/2 = 50%
At second half life = 50%/2 = 25%
Thus after 5 second 25% C-15 will remain.
Answer:
The parts mix to form a liquid, not a solid.
<span>A. the sum of the protons and neutrons in one atom of the element</span>
Copper is sought because it is a very useful metal used for conducting heat and electricity, its made of one pure element called copper (not surprisingly) and is slightly uncommon. Making its demand higher.
