Technician a says that pressure below atmospheric pressure is called vacuum and is measured in inches of mercury (hg). technician b says that a manifold absolute pressure (map) sensor uses a low vacuum in the sensor to determine the pressure. who is right?
a. technician a only
b. technician b only
c. both technicians a and b
d. neither technician a nor b

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.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?