When fossils or minerals certain unstable elements are sometimes locked into them. the proportion of these unstable elements gradually decreases over time as they decay into other materials in a predictable way. scientist use the rate at which such unstable elements decay to determine when fossils or minerals formed. the technique described above is known as

Avery long solenoid of inner radius 2.75 cm creates an oscillating magnetic field of the form = for this solenoid, =0.00425 t and =319 rad/s. (a)what is the maximum value of the induced electric field at a perpendicular distance 1.45 cm from the axis of the solenoid? (b) what is the maximum value of the inducted electric field at a point 5.85 cm perpendicular from the axis of the solenoid?