Abalance uses small metal weights of known mass to determine the mass of a substance. where would a balance not function correctly?
a. in a vacuum on earth
b. on the moon's surface
c. on the earth's highest mountain
d. in a zero gravity environment

In a zero gravity environment. As gravity fields extend out in the vase expanse of space indefinitely, though scientists use the term where no noticeable effects are seen on matter. When an object is in the weaker part of a gravity field, there is nothing that can determine the weight of the object, as that would require a strong gravitational field. Which means the correct answer is  D I hope it helps you. It definitely would not be in a vacuum on Earth or on the Earth's highest mountain. Like I said though, I hope this helps.

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