Mr. hersch triggered a rooting reflex in his infant son by touching him on the

Iwill give brainliest if you answer right : )

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?