An object is constrained by a cord to move in a circular path of radius 1.3-m on a frictionless, horizontal surface. The cord will break if the tension exceeds 15.7-N. The maximum kinetic energy that this object can have is J. Round your answer to the nearest whole number.

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