The circuit consists of three resistors connected in parallel
Theirfore equalent resistance of the circuit is given by the formula
1/R = 1/R1+1/R2+1/R3
1/R = 1/2+1/6+1/4
1/R = 0.5+0.167+0.25
1/R = 0.916
R = 1/0.916
R = 1.09
Option (b) is correct
vas expev Ca ia
Problem 2. Determine the tension forces in wires CA and CB required for equilibrium of the cylinder that has a mass of 10 kg. Take the angle as 40°. (30 pts) Problem 3. If cable CB in Problem 2 is subjected to a tension that is twice larger than the tension in cable CA, what would be the angle for equilibrium of the 10-kg cylinder? Also, what are the tensions in wires CA and CB, then? (30 pts)
1. Identify the acid (A), base (B), conjugate acid (CA) and the conjugate base (CB) in the following equation (5) NH3(aq) + H2O + NH(aq) + OH(aq) B CB CA 2. Determine the pH of a solution at 25°C in which the hydronium ion [H3O+] is 3.5 X 10 - log 3.5x10-4 - pH = 3.45 M. C 3. Calculate the [H3O+] in a solution at 25°C in which the pH is 4.76. (5)
(L33*) Verify the following commutation relations (a) [AB,C] A[B,C +IA,CIB (b) [A,|B C]l-IA,BC] [A,CB] The commutator [..] is an important operation in quantum physics. If the elements A.B.C... satisfy the following conditions, they are said to form a Lie-algebra (ab,c are real or complex numbers): ii) [A,Bl -IB.Al iii) The Jacobi identity [AJB CII + [BJCA]] + [CJA,BII :0 - BA Prove the Jacobi identity for [A,B] AB (L33*) Verify the following commutation relations (a) [AB,C] A[B,C +IA,CIB (b) [A,|B...
Label the signals due to Ca, Cb, Cc, and Ca in the 13C NMR spectrum. н Н н—са—срн Н н н 140 120 100 80 60 40 20 о PPM
r=k*Ca*Cb. What are the units for the rate constant k?
Rank the indicated carbon atoms in order of increasing chemical shift. Ca Cb C Br
Identify each part of the cell in the figure below. Mitochondrion CA CB Cc COD CE CBF CG CH 1. Mitochondrion 2. Smooth endoplasmic reticulum 3. Nucleus 4. Cytosol 5. Ribosome 6. Rough endoplasmic reticulum 7. Golgi apparatus 8. Lysosome
Problem 2 Suppose that the heat capacities CA and CB of two objects A and B are measured at constant pressure and they are found to be temperature-independent. Initially, TB > TA. Suppose the two objects are brought into thermal contact but are isolated from the surroundings. What is the equilibrium temperature of the combined objects?
UNIT Exam I The following compound is CA Aromatic CB) Anti-a romatic (C) Non-aromatic (D) None of the Above ③ The following compound is CA) Aromatic Cc) Non-aromatic CB) Anti-aromatic (D) None of the Above The following compound is * (A) Aromatic and (c) Non- aromatic CBAnti-aromatic (0) None of the Above Which of the following resonance contributors is correct, based on the compound below? CH₃ – CH=CH₂ (A) CH₂=CH-CH₂ (C) CH₂=C=CH₂ (B) CH₂=CH-CH₂ (D) None of the Above