Letting d d represent the maximum displacement, the extremes of the block's motion are at position a, where x = − d x=−d, and at position c, where x = d x=d. at what point in the motion is the speed of the block at its maximum?

this allows people to make the best decision or pursue the best option. when alternatives are weighed using their advantages and disadvantages, the option whose disadvantages outweigh the advantages (based on a qualitative or quantitative analysis) are shunned while those whose advantages outweigh their disadvantages are pursued.  

the higher the current the higher the mag field around it the higher the influence on the compass

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.