An airport has a moving walkway in a long corridor (of lengthL) designed to savepassengers time. If Tom walks through the corridor (not on the moving walkway), it takes him150 s to reach the far end. If Tom stands on the moving walkway, it takes him 100 s to reach thefar end. How long would it take Tom to reach the far end if he got on the moving walkway andwalked at his normal speed relative to the walkway itself?

60 seconds

Explanation:

The following information can be derived from the question:

rt=d,

150r = 100

Divide through by 150

r = 100/150

r = 0.67

r = 0.67 feet/second

Fir the second part of the question,

100r=100

r = 100/100

r = 1

r= 1 feet/second

combined rate will now be:

= 0.67+1

= 1.67 feet/second

We then slot it back into the formula

rt = d

1.67t = 100

t = 100/1.67

t= 59.88 seconds

t = 60 seconds approximately

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