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Q. A 0.075 kg toy airplane is tied to the ceiling with a string. When the airplane's motor is started it moves with a constant speed of 1.05 m/s in a horizontal circle of radius 0.49 m, as illustrated in Figure 6-34. Find the angle the string makes with the vertical and the tension in the string.

Q. A 2.5 and a 4.0 resistor are connected in parallel; this combination is connected in series with a 1.1 resistor.If each resistor is rated at 0.7 (maximum without overheating), what is the maximum voltage that can be applied across the whole network?

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