<u>Answer:
</u>
The study carried out by Dr. Xu is a randomized controlled study.
<u>Explanation:</u>
- For the sake of determination of how the results of the students change by doing certain changes to the examination pattern, Dr. Xu devised that the change is considerably evident.
- Dr. Xu provided and intervention in the process of exam in the form of guides which helped the students to score better later. Hence, from the standard of conduct of the study, it can be said to be a randomized controlled study.
Answer:
watershed is the correct answer.
Explanation:
Can you write your choices for us please ?
Answer:
I think that it is 1 3 and 4
Explanation:
<span>forces do not cancel out because they act on different bodies </span>
<span>also the forces acting on the horse is not just the force he exerts on the wagon </span>
<span>he also applies force on the ground so the static friction on the ground helps the horse move forward </span>
<span>forces acting on the horse are friction in its direction of motion and the tension opposing motion </span>
<span>if the surface has enough friction he can always move</span>
