a body has weight 20N how much force is required to move it vertically upwards with an acceleration of 2m/s

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 diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good