The velocity vectors for an object moving in a circle are shown on the diagram at the below. Which of the following vector diagrams correctly represents the change in velocity?

John throws .4 kg ball with velocity of 18 m/s. hits .2 kg bottle and bottle flies 25 m/s. how fast is ball traveling after hitting the bottle?

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is