4. A parallel-plate capacitor in air has a plate separation of 1.35 cm and a plate area of 35.0 cm2. The plates are charged to a potential difference of 150 V and disconnected from the source. The capacitor is then immersed in distilled water. Assume the liquid is an insulator. Determine: a. the charge on the plates before and after immersion b. the capacitance and potential difference after immersion the change in energy of the capacitor after immersion C.

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Q: Determine the resultant of the following concurrent forces: 8 N, 60° N of E and 40 N, 45° N of W…

A: To calculate the resultant force of the two forces. Given:Force 1: F1=8 NDirection of Force 1:…

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A: To find:  The moment of force with respect to C, using rCA→ and rCB→

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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.