How did humans decide how long a year should be

According to the tide table below what time of day will the highest tide occur?

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?