Two point charges, 91 = 13 nC and q2 = 15 nC, are separated by a distance r = 7.4 x 10-2 cm. What is distance (r) in meters?

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A: As per guidelines I am answering only question 4. Please post remaining questions separately. 

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Q: how infrared spectroscopy work?

A: Answer Infra red spectroscopy used infra red radiation to excite the molecules. 

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Q: Which of the following units is equivalent to the unit of electric field? Group of answer choices m/...

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Q: A conducting sphere has a net charge of – 1.28 × 10-16?. What is the approximate number of excess el...

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Q: Which type of radiation would not be deflected by an electric field?

A: The answer is below

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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.