Which two actions could you take to weaken an electromagnet? A. Replace a 9V battery with a 3 V battery.
B. Decrease the length of the connecting wires in the circuit.
C. Increase the number of wraps of wire around the core.
D. Include an ammeter in the circuit.
E. Use a wooden core instead of a steel core.

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)

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.

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value