Why is it important to specify both magnitude and direction with some measurements and not others?

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

Which feature indicates that mars resides in the inner region of the solar system

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.