The impedance of a material is z=rhoc, the density times the speed of sound. consider the following information: zlung=0.18×106kg s/m2.zfat=1.34×106kg s/m2.what fraction of the incident intensity of a sound pulse will be reflected when sound travels from fat into lung?

In automobile steering wheel is shown what is the ideal mechanical advantage blank? if the ama is eight what is the efficiency of the steering wheel?

How many atoms of nitrogen are in the chemical formula ni(w on

Isobars are lines of constant or equal pressure on a weather map. they can be used to find areas of low or high pressure over a broad area, and they can tell us how intense the system may be. on weather maps, you may have noticed areas that have a large l or h over a region with lines circling around them. the l stands for low pressure and h stands for high pressure. the lines circling them are isobars. check out the pressure system and isobars over georgia and florida. what is the present weather in this area ? a) clear and sunny b) cold and cloudy c) changing weather d) lots of precipitation