what method would you use to differentiate two steel rods one of which is magnetised and the other unmagnetised​

Acricket ball of 70g moving with a velocity of 0.5 m/s is stopped by a player in 0.5s what is the force applied to stop the ball

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.