Aforce f = 73.6 n i + 60.0 n j is applied to a 12.3-kg cart on a level frictionless floor [x-horizontal, y-vertical directions]. the cart starts from rest and moves horizontally along the floor due to this force. what is the cart's instantaneous velocity (m/s) when it is moved by 8.61 m?

160 Joules

  For this problem, we can ignore the vertical component of the applied force and focus on only the horizontal component of 80 N and since work is defined as force over distance, let's multiply the force by the distance: 80 N * 2.0 m = 160 Nm = 160 kg*m^2/s^2 = 160 Joules.

  So the cart has a final kinetic energy of 160 Joules.

Explanation:

d) physical means can be used to separate the components of air.

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