One busy air route across the Atlantic Ocean is about 5500 km. The now retired Concord, a supersonic jet capable of flying at twice the speed of sound was used to travel such routes (speed of sound 343 ). (a) How long did it take the Concord to cover the 5500 km route?

(b) How long did it take a typical subsonic jet flying at a speed of 90% the speed of sound (0.90 x 343 m/s) to cover the same route?

The specific heat of silver is 0.057 calories/gram°c. if 10.0 grams of silver were heated and the temperature of the sample changed by 20.0°c, how many calories of heat energy were absorbed by the sample?

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)

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