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There are 1.505535375e+24 atoms in 2.50 moles of iron.
Answer:
Step-by-step explanation:
Answer:
top right
Step-by-step explanation:
If you imagine yourself building with that model you can see its that one
When the penny hits the ground, h will = 0.
So: Set h(t) = 0 = -4.9t^2 + 0t + 150 m
Then 4.9t^2 = 150, and so t^2 = sqrt(150 / 4.9) = plus or minus 5.53 sec.
We can use only the positive root, as we're measuring time.
t = 5.5 sec (answer)