Answer:
t = 23136 years old
Explanation:
The intensity of radiation obeys the exponential decay law.
(1)
Here:
λ is the radiation decay constant.
I is the intensity of radiation after t time.
I₀ is the initial intensity of radiation.
t is the time
Now, we know that the intensity of radiation is a 6% of what it would be in a freshly cut piece of wood, in other words:
(2)
Combining (2) with (1), we have:
(3)
Now, we just need to solve (3) for t.
(4)
and (5)
is the half-life.
In our case, we have ¹⁴C, so the
Finally, we can find t putting (5) in (4):
I hope it helps you!
The molecules held together are to weak so the substance melt and boil at low points.
Answer:
Vf = 9.622 m/s
Explanation:
Distance covered S=0.80m, Time t=0.087s and
g=9.81 m/s²
Required: Final velocity Vf when it hit the floor
Sol:
We have first find Vi so
Vi=Vit + 0.5 a t2
Vi =8.768m/s
Now Vf= Vi + at
Vf = 9.622 m/s