Answer:
Its A. Walking on the beach
Answer:
C. If the masses of the objects increase, then the force between them also increases.
Explanation:
If 
and 
are perpendicular, then their dot product is zero. This means
Solving for n is trivial; it follows that n = 3.
Answer:
D. 21 ml
Explanation:
Since, the cylinder is marked and graduated in the intervals if 1 ml. Therefore, the values between two consecutive ml, such as between 30 ml and 31 ml can not be determined. Because, we do not have any scale in between the ml. So, the least count of this instrument is 1 ml. This graduated cylinder can give the answers to zero decimal places, accurately. And it can not determine any decimal value due to its graduating or the marking limitation. So, all the options given, contain a decimal value, except for the option D. In option D there is no decimal value, hence it is a correct answer.
D. <u>21 ml</u>
