Is the earth flat, and do we have a shield around the earth?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

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?