This well‐established book, now in its Third Edition, presents the principles and applications of engineering metals and alloys in a highly readable form. This new edition retains all the b…Full description
describe el relado del documento clinico como es la historia clinica asi como el correcto desarrollo del examen fisicoFull description
describe el relado del documento clinico como es la historia clinica asi como el correcto desarrollo del examen fisico
1. I f a. b.
i=√ −1 , what is
ln ( i
i
) ?
− π 2
−π
c. Undefned, Undefned, argument argument is a negative negative number number d. Undefned, Undefned, argume argument nt is a compl complex ex number number 2. Calculate the pH of 0.10 M ammonium ammonium bicarbonate. bicarbonate. Given:
pK a1 a1 (H2CO3 ! ".3# pK a2 a2 (H2CO3 ! 1$.33 pK b (%H3 ! &.#' K ! 1$)1& a. 3."* b. '.'" c. #.$$ d. +.3' 3. The hightempera hightemperature ture supercon!uc supercon!uctor tor "ttrium barium copper copper o#i!e $M% & '''.1( 1' x ), ), when heate! un!er *owing H2 at 1000oC, forms a soli! mi#ture of o#i!es an! copper accor!ing to the following stoichiometr"+ stoichiometr"+ YBa2 Cu3 O7 − x ( s ) + ( 3.5 − x ) H 2 ( g ) →
%hen 3.3(- mg of
1 2
Y 2 O3 ( s )+ 2 BaO ( s ) + 3 Cu ( s )+( 3.5 − x ) H 2 O ( g )
YBa2 Cu3 O 7 − x were subecte! to anal"sis,
31.''1 mg of soli! remaine! after heating to 1000 oC. /ole for x . a. $.2$ b. $."$ c. & d. ' . or a multipleeect multipleeect eaporator eaporator s"stem, the total total cost in h, which inclu!es initial an! operating costs, is gien b" the following e4uation+ TotalCost =2000 + 1600 ( N −1 ) +
37500 1.75
N
where N is the number of eects. How man" eects will gie the minimum cost? a. 2 b. 3 c. & d. '
5. 6an7 the following carbocations in or!er of increasing stabilit".
a. ! - ! b. ! - ! c. - - - d. - - - '. 8 hea" bloc7 of mass M is slowl" place! on a cone"or belt moing with a spee! v . The coe9cient of friction between the bloc7 an! the belt is μ. Through what !istance will the bloc7 sli!e on the belt? 2
a. b.
v μg 2v
2
μg 2
c. d.
v 2 μg 4v
2
μg
-. :ame the ;utch ph"sicist who coine! the term enthalpy , propose! the irial e4uation of state for real gases, an! won the :obel ri
a. 5e critical point 6or multi)component s7stems occurs at te igest temperature and pressure at ic bot li8uid and vapor pases can coexist. b. 9t te critical point, te li8uid and vapor pases are still in e8uilibrium but are indistinguisable. c. :or a pure ;uid, te critical point violates te ule since : ! C ? = @ 2 ! 1 ? 1 @ 2 ! 2, but tere sould be ero degrees o6 6reedom. d. 9ll o6 te above statements are 6alse. (. resh uice contains 15> soli!s an! =5> water b" weight an! is to be concentrate! to contain 0> soli!s. In a single eaporation s"stem, olatile constituents escape with water, leaing the uice with *at taste. To oercome this problem, part of the fresh uice b"passes the eaporator. If the uice leaing ust after the eaporator contains 55> soli!s, what fraction of the fee! is b"passe!? a. 1&.$"A b. 1#.'#A c. 21.#$A d. %one o6 te above 10. /team at 350oC *ows into a porous plug from a 10Ma line. It e#its at 1 bar. %hat is the e#it temperature? /pecic properties at the inlet are @ & 2'((.2 7AB7g an! H & 2(23. 7AB7g. Pertinent data:
5 BoC 2$$o C 2'$o C 3$$o C 3'$o C a. b. c. d.
22&.2*oC 22#.21oC 233."+oC 3'$oC
= ! 1 bar U B/D/g H B/D/g 2"'+.$ 2+#'.3 2#33.#
