True or false: and a physical change some of the physical properties of the substance may be altered in the chemical composition remains the same?

True, in a physical change, some of the physical properties of the substance may be altered but the chemical composition remains the same.

Option True

Explanation:

The matter can undergo variations in physical or chemical. The physical changes of a matter occur when the matter undergoes changes in the physical properties like change in the state of matter, weight, etc.

But the matter's chemical compositions will remain constant in case of matter undergoing physical change. While in chemical change, the matter will undergo change in the composition but there will be no change in the physical properties. Hence, the given statement is true about a physical change.

(75°f − 32) × 5/9 = 23.889°c

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