Vernier Calipers Simulator

11/2/2017

v8:
fix sound
v7:
fix bug in answers

v5-6:
added sound
added cm option by default, mm is still available
enhance graphics



v4:
improved zoom
optimised view size
added a centre of view for viewing different parts of the vernier
v3:
color of vernier scale is changed from yellow to orange
check out the options such as "remove the red and green arrows" via the dropdown menu
centimetre cm is added on the drawing, but the testing module is still on mm.
magnify is added and centre!