Julia produces a 2 ma current by moving the south pole of a bar magnet into a solenoid. the solenoid contains 150 loops of wire. which change should julia make to generate a larger current? a. moving the magnet slower b. using more loops of wire in the coil c. using the north pole of the magnet d. setting the magnet down in the solenoid

Newton's law of cooling states that the rate of change in the temperature t(t) of a body is proportional to the difference between the temperature of the medium m(t) and the temperature of the body. that is, startfraction dt over dt endfraction equals upper k left bracket upper m left parenthesis t right parenthesis minus upper t left parenthesis t right parenthesis right bracket , where k is a constant. let kequals0.04 left parenthesis min right parenthesis superscript negative 1 and the temperature of the medium be constant, m(t) font size decreased by 3 equivalent font size decreased by 3 294 kelvins. if the body is initially at 369 kelvins, use euler's method with hequals0.1 min to approximate the temperature of the body after (a) 30 minutes and (b) 60 minutes.