A 12.5 kg box is placed on the horizontal surface of a table where the coefficient of kinetic friction between the box and the table is 0.120. This box is connected to a second 5.50 kg box that is hanging off of the table by an inextensible, massless cord that runs over a massless, frictionless pulley. What is (a) the magnitude of the acceleration of the boxes and (b) the magnitude of the tension in the cord? (c) Include a force (or free-body) diagram of the

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.