Acar traveling 93 km/h strikes a tree. the front end of the car compresses and the driver comes to rest after traveling 0.90 m part a what was the magnitude of the average acceleration of the driver during the collision? express your answer using two significant figures a= m/s
part b express the answer in terms of "g's," where 1.00g 9.80 m/s2 express your answer using two significant figures.

A)

B)

Explanation:

First we need to convert car's speed:

Vo = 93 km/h * 1000m / 1km * 1h / 3600s = 25.83m/s

Now we can calculate the acceleration with:

  Solving for a:

   where Vf=0m/s   Vo = 25.83m/s   d=0.9m

If we divide this value by gravity = 9.8, we get:

An atomic nucleus would give off a particle to become stable. 
An atom is unstable if the forces among the particles that make up the nucleus are unbalanced; if the nucleus has an excess of internal energy. Instability of an atom's nucleus may result from an excess of either neutrons or protons. An unstable nucleus would attempt to attain stability by giving off the nucleons (protons or neutrons), as well as other particles or by releasing energy in other forms.