Answer:
The velocities of each ball are
![v_{f2}=8.08 m/s](https://tex.z-dn.net/?f=v_%7Bf2%7D%3D8.08%20m%2Fs)
![v_{f1}=5.28 m/s](https://tex.z-dn.net/?f=v_%7Bf1%7D%3D5.28%20m%2Fs)
Explanation:
Using the conservation of momentum to find the velocity of each balls after the collision
![m_1*v_1+m_2*v_2=m_1*v_{f1}+m_2*v_{f2}](https://tex.z-dn.net/?f=m_1%2Av_1%2Bm_2%2Av_2%3Dm_1%2Av_%7Bf1%7D%2Bm_2%2Av_%7Bf2%7D)
![3kg*8m/s+2kg*4m/s=3kg*v_{f1}+2kg*v_{f2}](https://tex.z-dn.net/?f=3kg%2A8m%2Fs%2B2kg%2A4m%2Fs%3D3kg%2Av_%7Bf1%7D%2B2kg%2Av_%7Bf2%7D)
![32 kg*m/s=3kg*v_{f1}+2kg*v_{f2}](https://tex.z-dn.net/?f=32%20kg%2Am%2Fs%3D3kg%2Av_%7Bf1%7D%2B2kg%2Av_%7Bf2%7D)
Here have one equation but have two variable don't know so
![e=\frac{v_{f2}-v_{f1}}{v_1-v_2}](https://tex.z-dn.net/?f=e%3D%5Cfrac%7Bv_%7Bf2%7D-v_%7Bf1%7D%7D%7Bv_1-v_2%7D)
![0.7=\frac{v_{f2}-v_{f1}}{8m/s-4m/s}](https://tex.z-dn.net/?f=0.7%3D%5Cfrac%7Bv_%7Bf2%7D-v_%7Bf1%7D%7D%7B8m%2Fs-4m%2Fs%7D)
![v_{f2}-v_{f1}=2.8](https://tex.z-dn.net/?f=v_%7Bf2%7D-v_%7Bf1%7D%3D2.8)
Now have two equations and two variables so solving using
![v_{f2}=8.08 m/s](https://tex.z-dn.net/?f=v_%7Bf2%7D%3D8.08%20m%2Fs)
![v_{f1}=5.28 m/s](https://tex.z-dn.net/?f=v_%7Bf1%7D%3D5.28%20m%2Fs)
Ok here's a rough image of how a typical energy diagram works. You give a little energy (A) and you get the potential that was in there all along. Kinda like pushing a big rock off a cliff. You do a little work then get a lot of energy out as the PE turns into other forms. In a match it's heat and light
Hello!
Yes, someone with an IQ score of 120 can be gifted.
An IQ score of 120 means that the individual is moderately gifted. Although this IQ doesn't qualify for gifted education programs, research shows that people with IQs of about 145-180 don't perform significantly better than people with 120s IQ in terms of success.
As an example, professor Dean Simonton from the University of California found that an optimum leader should have an IQ in the 120-125 range, so having an IQ of 120 would mean that the individual is gifted for leadership.
Have a nice day!