A62.0-kg woman runs up a flight of stairs having a rise of 4.28 m in a time of 4.20 s. what average power did she supply? a) 63.2 w b) 619 w c) 596 w d) 629 w e) 609 w

The average power is 619 W.

(B) is correct option

Explanation:

Given that,

Weight = 62.0 kg

Height = 4.28 m

Time t = 4.20 s

We need to calculate the work done

Work done by woman

Where,

m = mass

g = acceleration due to gravity

t = time

Put the value into the formula

We need to calculate the power

Using formula of power

Where,

W = work done

t = time

Put the value in to the formula

Hence, The average power is 619 W.

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

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