Agas within a piston-cylinder assembly undergoes a thermodynamic cycle consisting of three processes: process 1-2: compression with pv = constant, from p1 = 1 bar, v1 = 2 m3 to v2 = 0.2 m3 , u2 - u1 = 100 kj. process 2-3: constant volume to p3 = p1. process 3-1: constant-pressure and adiabatic process. there are no significant changes in kinetic or potential energy. determine the net work of the cycle, in kj, and the heat transfer for process 2-3, in kj. is this a power cycle or a refrigeration cycle? explain. (hint: evaluating whether the work is done by or on the system should answer the question of what type of cycle this is.)

the answer is mosques. they are an important part of islamic culture.

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