The answer is (a).
Golf balls have a higher density than water hence sink to the bottom.
Answer:
He did not multiply the chlorine and oxygen atoms by the coefficient 4
Explanation:
As we know that friction force on box is given by

here we know that

here we have
m = 12 kg

so now we have

now we will have


so it required minimum 49 N(approx) force to move the block
Answer:
12. you measure mass with a balnece. such as a triple balence beam or an electronic balance.
i dont know 11 sorry
#4. It says "someone sitting in a chair" So the objects involved are the person and the chair. D is the answer because it talks about the action/reaction forces between the person and the chair.
#5. Work = Force (parallel to direction of distance) * distance. A, B and D are not correct because there is no distance. C. is the best answer