A type of material that tries to prevent the flow of thermal energy is called an insulator.
Answer:
-8.04 m/s2
Explanation:
To find the answer to this, you have to use the 4th kinematic equation:

You plug into the equation to get:

solve for a to get
-8.04 m/s2
If I am correct a <span>child holds a toy above her head and then lets it fall to the ground. </span>
I think the answer is Snow flakes