Please provide solutions so I can understand them better. Thank you

5. In the circuit shown, the resistors are connected in parallel. (a) Find the equivalent resistance of the two resistors. (b) Find /1. 21 V 3 56 52 6. In the circuit shown, the resistors are connected in series. 20 0 1402 (a) Find the equivalent resistance of the four resistors. (b) Find /1. 27 V 3 102 160 7. In the circuit shown. R] = 2.6 82. R2 = 14 2, and R3 = 6.052. 1, R, = 2.60 The value of the voltage source is 51 V. (a) Find the equivalent resistance of the three resistors. 51 V R2 = 14023 3 Riz = 6.052 (b) Find /1. 8. Three point masses are affixed to the surface of a massless table that can rotate about its center without friction, as shown. What 8.0 kg torque is required to give the system an angular acceleration of 2.0 radians per second squared? 15 cm 20 cm 2.0 kg O 25 cm: 4.0 kg 9. A level circular track has a radius of 121 meters. A 760-kilogram car moves around the track with a constant linear speed of 28 meters per second. What coefficient of static friction between the tires and the track is required to keep the car from sliding sideways? 10. The liquid in the first pipe was flowing at an average speed of 18 centimeters per second. When it flowed into the second pipe, the average speed increased to 72 centimeters per second. If the radius of the first pipe was 4.6 centimeters, what was the radius of the second pipe