During a circus act, one performer swings upside down hanging from a trapeze holding another, also upside-down, performer by the legs. if the upward force on the lower performer is three times her weight, how much do the bones (the femurs) in her upper legs stretch? you may assume each is equivalent to a uniform rod 35.0 cm long and 1.80 cm in radius. her mass is 60.0 kg.

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)

What are similarities and differences of reflection, refraction, diffraction and absorption?

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?