A long wire with a square cross-section 13 cm on a side carries a current of 10 A that is uniformly distributed over the cross-section of the wire. What is the value of the integral along a square with side length 8 cm concentric with the wire and with sides parallel to those of the wire

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

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

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it

490 n

f=125n a=2.5m/s2