Your local am radio station broadcasts at a frequency of f = 1100 khz. the electric-field component of the signal you receive at your home has the time dependence e(t) = e0 sin(2πft), where the amplitude is e0 = 0.62 n/c. radio waves travel through air at approximately the speed of light.
a) at what wavelength, in meters, docs this station broadcast?
b) what is the value of the radio wave's electric field, in newtons per coulomb, at your home at a time of t = 3.1 μs?

Abox is pushed down at an angle of 32 degrees on a rough surface. the box moves to the right.what equation should be used to find the net force in the y-direction? answers: a. fnet,y = fn - fgb. fnet,y= fp - ffc. fnet,y = fn-fg- fpcos(32)d. fnet,y = fn-fg-fpsin(32)

A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!

Describe the function of the endomembrane system? what organelles are involved?