a wave propagates in free-spacc with clectric ficld e = | 100e -1220z + 100e +j220z | à (a) show that e satisfies the source-free wave equation (b) what arc the wave's phase vclocity and frcquency?

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?

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

The ability to make things happen is also called a. heat b. force c. matter d. energy