a 75 kg shell is fired with an initial speed of 125m/s at an angle 55∘ above horizontal. air resistance is negligible. at its highest point, the shell explodes into two fragments, one four times more massive than the other. the heavier fragment lands directly below the point of the explosion. if the explosion exerts forces only in the horizontal direction, how far from the launch point does the lighter fragment land?

20) what is a magnetic field? 21) in which direction do magnetic field lines always point? 22) sketch a diagram showing how a plotting compass points around a 23) name two magnetic poles that will: a) attract each other b) repel each other. 24) explain why you can use a compass to navigate. 25) what's an electromagnet? 26) list two ways to increase the strength of an electromagnet. 27) the wire in a simple motor feels a force when a current flows through it. why is this? i need answers to check mine