Which of the following sentences MOST accurately summarizes the main ideas of the article? *
1 point
a. While there is some concern over the safety of weightlifting for students. CrossFit has become a popular gym class in many schools.
b. Despite the popularity of CrossFit in gym classes, experts are calling for the program to be discontinued in schools due to weightlifting safety concerns.
c. The Crossfit exercise program has been proven absolutely safe for participants of all ages, including students from elementary through high school.
d. Teachers offering CrossFit are convinced that the program's popularity and benefits outweigh any concerns about safety, and that it's the best way to exercise.

Rank the torques on the five doors shown in the figure above from least to greatest. note that the magnitude of all the forces is the same

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.

Can anybody me with this? ? (picture included.)