(a) an 11.0 kg salami is supported by a cord that runs to a spring scale, which is supported by a cord hung fromthe ceiling (fig. 5­35a). what is the reading on the scale, which is marked in weight units? (b) in fig. 5­35b thesalami is supported by a cord that runs around a pulley and to a scale. the opposite end of the scale is attachedby a cord to a wall. what is the reading on the scale? (c) in fig. 5­35c the wall has been replaced with a second11.0 kg salami, and the assembly is stationary. what is the reading on the scale?

hypothesising or postulating

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

a sonic boom is a loud boom that breaks the sound barrier

explanation: