Two wooden crates with masses as shown are tied together by a horizontal cord. Another cord is tied to the first crate, and it is pulled with a force of 195 N at an angle of 20.0°, as shown. Each crate has a coefficient of kinetic friction of 0.470. 25.0 kg 14.0 kg 20.0°

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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.