A piston-cylinder arrangement, shown in figure, contains air at 250 kPa and 300oC. The 50-kg piston has a diameter of 0.1 m and, initially pushes against the stops. The atmosphere is at 100
kPa and 20oC.
(a) Represent the forces acting on the piston through a free body diagram for initial condition.
The cylinder now cools as heat is transferred from air to the ambient surroundings, thereby
reducing the air pressure, resulting in the piston to start moving down.
(b) Represent the forces acting on the piston through a
free body diagram for this condition.
(c) Find the pressure when the piston is just about to
move down?

i don't understand is there any other way you can rephrase it plz let me know in the comments and i will do it.

explanation:

correct it is c.) b b

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

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