Is the bond formed between lithium and fluorine ionic, covalent or ionic? Explain your answer (2 marks)

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?