Consider a low-speed subsonic wind tunnel with a nozzle contraction ratio of 1 : 20. one side of a mercury manometer is connected to the settling chamber and the other side to the test section. the pressure and temperature in the test section problems 281 are 1 atm and 300 k, respectively. what is the height difference between the two columns of mercury when the test section velocity is 80 m/s?

What determines the amount of inertia an object has

Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?