By what i know i think that the answer would be A a homogeneous mixture.
Answer:

Explanation:
According to the free body diagram, in this case, we have:

Recall that the force of friction is given by:

Replacing and solving for the coefficient of kinetic friction:

We have an uniformly accelerated motion. Thus, the acceleration is defined as:

Finally, we calculate
:

The answer is "A" Endothermic. Hope that helped :)
Answer:2.67kgm/s cube
Explanation: density = mass ÷ volume = 400 ÷ 150