A hydraulic jack can be force multiplier because it can take a small force
Answer:
Their experimental design lacks control group
Explanation:
Based on what I read, the scientists don't have a control group as one of the main groups thus they cannot, in scientific sense, say that the medicine is better or worse. You always need a control group receiving no intervention because then we can compare groups and assess the effectiveness of that intervention (in our case if we had control group vs people who received the medicine, we could see if the people who received the medicine had improved condition etc when compared to participants who did not receive anything)
a. Particles in warmer objects make particles in colder objects move faster.
Is their a multiple choice to choose from I'm not sure the answer I got is even right.
That would be very helpful.
