An iron atom (Fe) has 26 protons in it. If the atom has 20 electrons in it, explain what type of charge it has and how you can t
1 answer:
You might be interested in
Answer:
a) t = 11.2 s
b) v = 70.5 mph
Explanation:
a)
- Since we need to find the time, we could use the definition of acceleration (rearranging terms) as follows:
- where vf = 50 mph, and v₀ = 10 mph.
- However, we still lack the value of a.
- Assuming that the acceleration is constant, we can use the following kinematic equation:
- Since we know that Δx = 500 ft, we could solve (2) for a.
- In order to simplify things, let's first to convert v₀ and vf from mph to m/s, as follows:
- We can do the same process with Δx, from ft to m, as follows:
- Replacing (3), (4), and (5) in (2) and solving for a, we get:
- Replacing (6) in (1) we finally get the value of the time t:
b)
- Since the acceleration is constant, as we know the displacement is another 500 ft (152.4m), if we replace in (2) v₀ by the vf we got in a), we can find the new value of vf, as follows:
- If we convert vf again to mph, we have: