A machine is brought in to accomplish a task which requires 100 ft.-lbs. of work. Which statements are correct:

the required machine will reduce the work for the employees
the machine will require an input greater than 100 ft.-lbs.
The machine may accomplish the task faster than manual work
friction within the machine will reduce the amount of work required to accomplish the task

2: The machine will require an input greater than 100 ft-lbs

3: The machine may accomplish the task faster than manual work

Explanation:

Got this right on a quiz.

Hope this helps:

i think if it were me i whould divide 300 dide 15

step-by-step 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