7. mildred was driving 12 m/s and slowed
to 8 m/s in three seconds. mildred's
acceleration can be calculated as:
0 0
id
0 0
1223
33

The acceleration of Mildred is, 1.33 m/s²  

Explanation:

Given data,

The initial velocity of Mildred, u = 12 m/s

The final velocity of Mildred, v = 8 m/s

The time period of travel, t = 3 s

The acceleration of Mildred,

                                   a = (v-u)/t

                                    a = (8 - 12) /3

                                       =  -4/3

                                       =  -1.33 m/s²

The negative sign indicates that the Mildred is decelerating.

Hence, the acceleration of Mildred is, 1.33 m/s²    

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molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.