Physics, 21.10.2020 05:01 barboursj

What are the differences and similarities of physical and chemical changes?

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Physics, 22.06.2019 04:40, love5965

Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely

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Physics, 22.06.2019 16:50, justkevin1231

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.

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Physics, 22.06.2019 19:30, stephstewart1209

If the area of a square has increased by a factor of 16, by how much has each side increased?

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Physics, 22.06.2019 19:30, FireFlight

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.