Problem 61
Determine the percent uncertainty in 6, and in sin 6, when(a) 6 = 15.0 0.5, (b) 6 = 75.0 0.5.
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Physics 2 for Engineering Week 4 Notes 26 September – 29 September Chapter 23 Electric potential energy is a scalar quantity Unit is Joules (J) Potential energy for two point charges assuming U = 0 waen r = infinaty U = kQq / r Review: F = kQq / r 2 E = kq / r 2 Electric potential is a scalar quantity Unit of electric potential is volts (V) 1 V = 1 J / C Unit of electric field is N / C or V / m Assume V = 0 when r = inainity V = kq / r ΔV = E * d at constant electric field For collection of point charges V = Σ kQ / r E direction points from positive charge to negative charge Positive charge moves in the direction of E from high to lo
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