A woman of mass 60kg is standing in a lift at a shopping centre a ) the lift is at rest

1. state the value of the weight of
the woman

2. state the value of the force exerted on the woman by the floor of the lift

b ) the lift accelerates upwards at 2.5 m / s². calculate the force exerted on the woman by the floor when the lift is accelerating

c ) the lift reaches a steady upward speed. state the value of the force exerted on the woman by the floor at this steady speed

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

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by