Which of the following statements are true? a. Earth's geographic south pole is also a magnetic south pole. b. Scientists have evidence that single isolated magnetic poles, called magnetic monopoles, exist. c. The north pole of a bar magnet will attract the south pole of another bar magnet. d. The south poles of two bar magnets will repel each other. e. The north poles of two bar magnets will attract each other. f. Earth's geographic north pole is actually a magnetic south pole.

Suppose that an electromagnetic wave which is linearly polarized along the x−axis is propagating in vacuum along the z−axis. the wave is incident on a conductor which is placed at z > 0 region of the space. the conductor has conductivity σ, magnetic permeability µ and electric permittivity ε. (a) find the characteristic time for the free charge density which dissipates at the conductor. (b) write the maxwell equations and derive the wave equation for a plane wave propagating in a conductor. (c) find the attenuation distance at which the incident amplitude reduces to e ^−1 of its initial value. (d) find the electric and magnetic fields inside the conductor. 8 (e) find the power loss per area of the incident electromagnetic wave at the surface of conductor.

If y gets smaller as x gets bigger and y have an relationship?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n