The average speed of sound in water is 1500 m/s. how long would it take a sound wave to travel 9000 m? your answer

Write short note on the following ; collision theory, rotation angle and angular velocity, centripetal acceleration, coriolis force, and newton's law of gravitation.

Aforce of 34.5 newtons is applied to an object at an angle of 45 º with the horizontal. what is the force acting on the object in the horizontal direction?

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?