During the experiment why must reagent bottles be closed when not in use

Afixed resistor has the following color bands: orange, red, brown, gold. what is the rated resistance

If your not fit to drive you have a responsibility to

Little's law can be applied to any part of the store, such as a particular department or the checkout lines. the store owner determines that, during business hours, approximately 84 shoppers per hour make a purchase and each of these shoppers spend an average of 5 minutes in the checkout line. at any time during business hours, about how many shoppers, on average, are waiting in the checkout line to make a purchase at the good deals store?