Hello can you please help with the following questions:

6. Define viscosity and laminar flow and thus explain Poiseuille's law.

7. Suppose a yo-yo has a center shaft that has a 0.350 cm radius and that its string is being pulled. (a) If the string is stationary and the yo-yo accelerates away from it at a rate of 1.50 m/s², what is the angular acceleration of the yo-yo? (b) What is the angular velocity after 0.800 s if it starts from rest?

8. Define wave. Why is it important to differentiate between longitudinal and transverse waves?

9.Explain the concept of superposition and interference with illustration.

10. Define Sound. Explain the concept of Doppler effect and Sonic booms.