What sort evidence must be gathered to support the idea that all living things are composed of cells
a. comparison should be made between nonliving things in living things to determine any similarities in their structure
b. samples of many kinds of living things should be examined under a microscope to identify the presence of cells
c. the functions of cells are many different living things should be monitored to see if they are identical
d. nonliving things should be examined to verify that the smaller part is they are composed are not cells

To support the idea that all living things are composed of cells samples of many kinds of living things should be examined under a microscope to identify the presence of cells.

Explanation:

Cell theory states that all living beings are composed of cells. To prove this a thorough examination of a number of living beings under a powerful microscope is needed. Parts of all living things when observed under the microscope are found to be made up of smaller units called cells.

This examination helps to identify differences between plant cells and animal cells. It also gives an idea of the existence of unicellular organisms.  

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j