In a physics experiment on static friction, two objects made

of identical material are tied together with string. the fi rst

object has a mass of 5.0 kg and the second object has

a mass of 3.0 kg. students measure the maximum force

of static friction as 31.4 n to move both objects across a

horizontal surface. t/i

(b) what is the magnitude of the tension in the string if

they pull on the fi rst object?

(c) a student pushes the 3.0 kg object with a force of

15.0 [down]. what are the magnitudes of the maximum

force of static friction and the tension now?

(d) will your answers to (c) change if the student pushes

down on the 5.0 kg object instead? explain.

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

answerscientific theory;