(Faraday's Law) A 4-cm long bar magnet is dropped into a vertical plastic pipe. 30cm lower, pipe has a short coil of =25 loops with diameter =0.75cm. A student connects end of the loop to Pasco voltmeter, and measures a spike of voltage with amplitude EMF=0.123 which is 6 point at half-maximum width, at acquisition rate of 1000 Hz. Estimate strength of the magnet, in Tesla, at poles.