A0.1 kg bouncy ball moves toward a brick wall with a speed of 11 m/s. after colliding with the wall, the ball travels at a speed of 8.8 m/s in the opposite direction. what is the magnitude of the impulse experience by the ball?

What are similarities and differences between refraction, reflection, diffraction and absorption?

If it takes 200 joules of energy to lift a bucket of water 3 meters in 2 seconds, how much power would be required to do the same amount of work in 5 seconds?

When a charged balloon sticks to a wall, the downward gravitational force is balanced by an upward static friction force. the normal force is provided by the electrical attraction between the charged balloon and the equal but oppositely charged polarization induced in the wall's molecules. if the mass of a balloon is 1.2 g, its coefficient of static friction with the wall is 0.71, and the average distance between the opposite charges is 0.80 mm, what minimum amount of charge must be placed on the balloon in order for it to stick to the wall? express your answer to two significant figures and include appropriate units.