Figure 24-47 shows a thin plastic rod of length L = 13.5 cm and uniform charge 43.6 fC. (a) In terms of distance d , find an expression for the electric potential at point P 1 . (b) Next, substitute variable x for d and find an expression for the magnitude of the component E x of the electric field at P 1 . (c) What is the direction of E x relative to the positive direction of the x axis? (d) What is the value of E x P 1 for x = d = 6.20 cm? (e) From the symmetry in Fig. 24-47, determine E y at P 1 .
Figure 24-47 shows a thin plastic rod of length L = 13.5 cm and uniform charge 43.6 fC. (a) In terms of distance d , find an expression for the electric potential at point P 1 . (b) Next, substitute variable x for d and find an expression for the magnitude of the component E x of the electric field at P 1 . (c) What is the direction of E x relative to the positive direction of the x axis? (d) What is the value of E x P 1 for x = d = 6.20 cm? (e) From the symmetry in Fig. 24-47, determine E y at P 1 .
Figure 24-47 shows a thin plastic rod of length L = 13.5 cm and uniform charge 43.6 fC. (a) In terms of distance d, find an expression for the electric potential at point P1. (b) Next, substitute variable x for d and find an expression for the magnitude of the component Ex of the electric field at P1. (c) What is the direction of Ex relative to the positive direction of the x axis? (d) What is the value of ExP1 for x = d = 6.20 cm? (e) From the symmetry in Fig. 24-47, determine Ey at P1.
At point A, 3.20 m from a small source of sound that is emitting uniformly in all directions, the intensity level is 58.0 dB. What is the intensity of the sound at A? How far from the source must you go so that the intensity is one-fourth of what it was at A? How far must you go so that the sound level is one-fourth of what it was at A?
Make a plot of the acceleration of a ball that is thrown upward at 20 m/s subject to gravitation alone (no drag). Assume upward is the +y direction (and downward negative y).
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