Describe the structure of an alpha particle

On a pirate ship, a 1.6m plank is held at one end to the ship. A 65kg pirate walks the plank with his 1.1kg parrot following 40cm behind him. What is the total clockwise moment acting on the plank when the pirate reaches the end of it?

What provides the centripetal force on a satellite and what are the factors that determine the size of the centripetal force on the satellite

A bullet is fired horizontally from a rifle 1.5m from the ground at 430m/s. How far does it travel and for how long does it travel before it hits the ground?

What is Fleming's left hand rule?