I’LL MARK YOU BRAINIEST IF U ANSWER IT A pulley system lifts a 500-N weight a distance of 1.5m. Marina pulls the rope A distance of 9.0m, exerting a Force of 100 N.

1) what is the mechanical advantage of this pulley system

2) What input did marina do on the road

3) what useful output did the rope do on the weight

4) what is the efficiency of the pulley system

THIS IS GRADE 8 PHYSICS PLEASE ANSWER

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

What is the role of lenses in microscopy?

Using a caesar cypher with an offset of three characters (a -> d, b -> e, z -> c), what would be the correct cypher text for the plain text "attack at dawn"?