At the top of a trajectory, a mortar shell explodes into two fragments: a 2.5 kg piece moves south west with a horizontal velocity of 100 m/s while 3.5 kg piece moves north with a horizontal velocity of 70 m/s. What was the horizontal direction of the cell just before explosion?

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

Akg a of 55 m at an of 11 ? . if is at 98 km/h,be ?

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.)