A student makes some observations about three solids and summarizes the results in the table below.
Mass
3.08
Solid 1
Solid 2
Solid 3
Melting Point
776°C
445°C
445°C
Color
white
white
3.0 g
9.8 g
white
Could any of the solids be the same substance and why?
Solids 1 and 2 could be the same substance. Even though they do not have the
same melting point, they have the same mass.
Solids 2 and 3 could be the same substance. Even though they do not have
the same mass, they have the same melting point and color.
Solids 1, 2, and 3 could all be the same substance. Even though they do not all
have the same mass and melting point, they have the same color.
Solids 1, 2, and 3 cannot be the same substance because they have different
combinations of color, melting point, and mass.

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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

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach

answeralert drivers who drift off the road;