Why should you not use glassware that you know is not totally clean?

How do ratio scale and diagrammatic scale work

If 360 joules of work are needed to move and create a distance of 4 m what is the weight of the crate

Which statement does lola need to correct, and why? a) statement 1 because spiral galaxies do not havearmsb) statement 2 because the bulges contain mostlyyoung red stars.c) statement 3 because the arms are made of mostlyyoung blue and blue-white stars.d) statement 4 because spirals galaxies contain littleto no dust.(c)