5which of the following is a difference between plant cells and animal cells? a. plant cells have a rigid structure, while animal cells have a more flexible structure. b. animal cells carry out photosynthesis; plant cells do not. c. in plant cells, dna is stored in the mitochondria; in animal cells, the dna is stored in the nucleus. d. animal cells undergo cell division; plant cells do not divide.

What is the fate of the electrons that interact with a specimen in an electron microscope?

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 graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.