Because of time constraints, the following data has been collected for you. in a previous experiment, 0.800 g of the green complex iron salt was placed in an erlenmeyer flask and heated with concentrated sulfuric acid until all oxalate ion was destroyed (co2, so2 and h2o are formed). ferric ion (fe3+) remained in solution and was reduced to fe2+ by reaction with al wire. the ferrous ion (fe2+) was then titrated with kmno4 solution according to equation (2) and 32.60 ml of 0.0100 m permanganate solution was required to reach the endpoint. the blank required 0.03 ml of the permanganate solution. find the mass % of iron in the complex salt.

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.

An ideal polarizer with its transmission axis rotated 30 degrees to the vertical is placed in a beam of unpolarized light of intensity 10w/m^2. after passing through the polarizer, what is the intensity of the beam? a. 8.7 w/m^2 b. 7.5 w/m^2 c. 5.0 w/m^2 d. 10 w/m^2 e. 2.5 w/m^2

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules