Aperson in a kayak paddles down river at an average speed of 10 km/h. after 3.25 hours,
a. how far has she traveled?
b. if she paddles upstream at an average speed of 4 km/h. how long would it take her to get back to her
starting point?

In order for the bug to fly through the air a force has to push the bug forward. identify this force. how does the bug produce

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.

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?