An 85 kg student runs up a staircase to a total height of 12 m. If the student does this in 5 seconds, how much work did the student do while climbing the steps?

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

the best type of safety net in hard times is mortgage

mortgage is the part of wealth, property or any personal thing that can be kept with a lender to lend someone money in hard times. the lender puts a condition that if the borrower did not give the loan in return within the specific period of time then the borrower's property would become the property of lender. this in hard times because if the loan is taken then it needs to be returned and this might happen that no one is willing to you in giving loan, therefore mortgage can be in the case if no one is willing to give loan.