AB has an outside diameter of 250mm and BC has an outside diameter of 150mm. Both pipes have a wall thickness of 8mm. If the temperature increases by 40° C, find the force in each pipe and the displacement of point B. Esteel= 200GPa, Ecopper = 120GPa, αsteel= 11.7x10-6/ ° C, αcopper = 16.9x10-6/ ° C.

answer: he got 23

explanation:

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

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide

higher potential

explanation:

because it is in a high speed so it must move into a of high potential