Explain why stationary waves are seen only certain frequencies (3 marks)

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it