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Solutions to Problem set on Chapter 21

# Solutions to Problem set on Chapter 21 - 1 You have a...

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1. You have a pure (24-carat) gold ring with mass 17.7 g. Gold has an atomic mass of 197 g/mol and an atomic number of 79. i. How many protons are there in the ring, and what is their total positive charge? ii. If the ring carries no net charge, how many electrons are there? 2. Three point charges are arranged along the x-axis. Charge q 1 = + 3.00 μC is at the origin, and charge q 2 = - 5.00 μC is at x = 0.200 m. Charge q 3 = - 8.00 μC. Where is q 3 located if the net force on q 1 is 7.00 N in the negative x-direction? 3. Two point charges are located on the y-axis as follows: charge q 1 = -1.50 nC at y = - 0.600 m, and charge q 2 = +3.20 nC at the origin (y = 0). What is the total force (magnitude and direction) exerted by these two charges on a third charge q 3 = +5.00 nC located at y = - 0.400 m? 4. Four identical charges are placed at the corners of a square of side L i. In a free-body diagram, show all the forces that act on one of the charges ii. Find the magnitude and direction of the total force exerted on one charge by the other three charges 5. Two small spheres with mass m = 15.0 g are hung by silk threads of length L = 1.20 m from a common

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Solutions to Problem set on Chapter 21 - 1 You have a...

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