Please help with graph and Questions: 1) What happens to the period as the length decreases?
2) Using your graph, what is the length of a pendulum with a period of 2’s?
3) What is the period for a length of 45 cm?
4) What are the sources of error for question #3? (ie. Why doesn’t everyone have the same answer for #3?)
5) How would a larger mass change your results?

How many molecules are present in 3 mols of silicon dioxide (sio2)?

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell