*URGENT* Three sleds are attached to each other by a string and are being pulled over snow covered ground. The coefficient of kinetic friction between the sleds and snow is 0.20. They are being pulled with a force of 20. N. The first sled, m1, has a mass of 4.0 kg, the second sled, m2, has a mass of 1.0 kg, and the third sled, m3, has a mass of 1.0 kg. Find: a) the force of friction on

(i) m1

(ii) m2

(iii) m3

(iv) The total amount of friction in the system

b) the acceleration of the sleds.

c) the tension in the string A (i. e. the tension in the string connecting sled m1 and sled m2).

d) Upload a Free-body diagram of each sled as well as the system.

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

tinyurl.com/wpazsebu

uranium fissions/breaks up giving out energy and neutrons

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