(b) Same conditions as in (a) except that conriecbing line is made up 

 of 10 ft. of 1/2 inch wrought-iron pipe. 



Ho = 0.023 ft. li = 2.3 X 10"5 lb. sec. /ft. sq. 



L = 10 ft. T = UO.5 sec. 



R = 0.0111 ft. A_ = 223 



a 

 w = 62. ;4 Ibs./cu.ft.. o4= 2 T/ -^ O.OUUl radians/se; 



U0.5 



■ - = S'llo^ AL = 8 X 2.35 X 10~^ x 0.04.-47 x 223 x 10 = 2.3A 

 waR^ 62. A X (0.0111)2 



CK = -67° - 4.0' 



= 67.7 X 140.5 = 26.4 sec. (measured 30 +_ 2 sec.) 

 360 



Ho' = 0.023 X 0.380 - 0.0083 ft. 



Measured Hq ' = 0,006 j^ 0.001 ft. 



A tide gage is to be placed in a gage neW 4 inches in diameter. The 

 connection is a I/8" cylindrical hole drilled through the tube wall. 



(a) Ho = 0.025 A/a = 223 



L = (approx.) cx = 2'7\ = 0.0338 rad./sec. 



70.8 

 a = 0.057 sq. in. 



r = 70.8 sec. 



M = 1.2 , 



N = I (a 1.113 )^ 2£ = I ( 1.113 )^ 64.4 = 0.088 



A a M 223 X 0.0388 1.2 



ho = 0.089 - 0.088 = 0.001 ft. 



The measured value of h© '".-as of the order of 0,001 ft., the precision of 

 the gage being +_ 0.001 ft. and no reduction in range being observable. 



(b) 



Ho = 0.024 ft. 





L = 





A 



a" = 4150 

 1 





T = 140.5 sec. 



o< 



- 



0, 



.0447 



sec. 



^0 



= 



1 







f 



= 











K 



- 



0, 



.2 





35 



