Please solve all the questions below correctly and promise for thumbs up and good rating on everything

8. Joe decides to race his younger sister, Debbie, and gives her a 25 m head start. At the instant Joe starts running, his sister reaches a velocity of 14 m/s [W] while accelerating at 0.5 m/s? [W]. If Joe accelerates at a rate of 1.2 m/s' [W], how long does it take for him to catch up to his sister? [THINK - 7 marks] 9. Consider the circuit below: 100 0 400 0 100 0 200 0 a) Calculate the total resistance of the circuit. [APP - 5 marks] b) Calculate the current in the circuit. [APP - 1 mark] 10. Draw the direction of electron flow, label the poles of the electromagnet, and determine the direction N S 11 in which the electromagnet will spin. [THINK - 3 marks] 1 1. a) State Lenz's law and it's conditions. [APP - 3 marks] b) Indicate the direction of the induced current in the wire using Lenz's law and explain how youdetermined it to be in that direction. [THINK - 3 marks] O N SPart C: Communication Questions 1. Recall the motor principle. In what three ways can the magnetic force be increased? [3 marks] 2. Differentiate between the pitch, the intensity, and the quality of sound produced by a musical instrument. [3 marks] 3. A wave crest is travelling along a heavy medium. The wave crest encounters a junction between the heavy medium and a light medium. Sketch the situation after the wave crest has passed through the junction. [2 marks] incident pulse )I- Slower A Faster medi u m medium