Three boxes rest side-by-side on a smooth, horizontal floor. their masses are 5.0 kg, 3.0 kg, and 2.0 kg, with the 3.0-kg mass in the center. a force of 50 n pushes on the 5.0-kg box, which pushes against the other two boxes. what magnitude force does the 5.0-kg box exert on the 3.0-kg box?

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.

Infrared radiation has wavelengths that are shorter than visible light is part of the visible light spectrum has wavelengths that are longer than visible light has the same wavelengths as ultraviolet radiation

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.