For the winter, a duck flies 10.0 m/s due south against a gust of wind with a speed of 2.5 m/s. what is the resultant velocity of the duck?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.