Valence electrons are the electrons in the outermost energy level of an atom — in the energy level that is farthest away from the nucleus.
I think it's A.
90+66=156
156/2=78
Reply:78kilometers in 2 hours.
Answer: 10 m/s^2
Explanation:
1) The second law of Newton gives the definition and formula to calculate the net force:
Net force acting on an object = mass * acceleration.
2) From that, when you know the net force acting of the object and its mass, you can solve for the acceleration:
acceleration = Net force / mass
acceleration = 50 N / 5 kg = 10 m/s^2, which is the answer.
According to Newton`s law. Force exerted by car,
![F = m a = 1100 kg \times 2 m/s^2 = 2200 \ N](https://tex.z-dn.net/?f=F%20%3D%20m%20a%20%3D%201100%20kg%20%5Ctimes%202%20m%2Fs%5E2%20%3D%202200%20%5C%20N)
After adding an additional 400 kg of mass, the force will be same therefore the acceleration
![F = 2200 \ N = (1100 \ kg + 400 \ kg) a \\\\ a = \frac{2200 \ N}{1500 \ kg} = 1.47 \ m/s^2](https://tex.z-dn.net/?f=F%20%3D%202200%20%5C%20N%20%3D%20%281100%20%5C%20kg%20%2B%20400%20%5C%20kg%29%20%20a%20%5C%5C%5C%5C%20a%20%3D%20%5Cfrac%7B2200%20%5C%20N%7D%7B1500%20%5C%20kg%7D%20%3D%201.47%20%5C%20m%2Fs%5E2)
Thus, the acceleration after adding the masses is 1.47 \ m/s^2.