The charge on a mole of electrons for some time and is the constant called the Faraday. The estimate of the value of a faraday is 96,485.3383 coulombs per mole of electrons. The estimate of the charge on an election base is 1.60217653 x 10^-19 coulombs per electron. Divided the charge of a mole of an election obtains the value of 6.02214154 x 10^23 particles per mole. According to Bender oxygen and hydrogen are elements other than carbon used to define mole.
(15 marks) Answers (a) C1 and C2 in series = 2uF Cupper = 2uF + 2uF + 2uF = 6uF Clower = 3uF + 3uF = 6uF Cequ = 3uF (b) Qupper = Qequ = Cequ V = 3uF100V = 300uC Vupper = Qupper/Cupper = 300uC/6uF = 50V Charge stored in C3 = 2uF50V = 100uC (15 marks) (15 marks) Question 2 (27.53) A charge Q is placed on a capacitor of capacitance C. The capacitor is connected into the circuit as shown in the figure below, with an open switch, a resistor, and an initially uncharged capacitor of capacitance 4C. The switch is then closed and the circuit comes to an equilibrium. In terms of Q and C, (a) (b) (c) (d) Find the final potential difference between the plates of each capacitor (10 marks) Find the charge on each capacitor. (7 marks) Find the final energy stored in each capacitor. (8 marks) Find the energy dissipated in the resistor.
Answer: b . 22^ 3SL iLA. Exercise 18: Using the diagram, a) f i n d the total resistance i n the circuit, b) Find the total current through the circuit. 32V Answer: a. Answer: b.
Students learn to operate electrical equipment using controllers, and to properly test, maintain, troubleshoot, and repair electrical circuits, motors, cables, circuit breakers, and other related electrical equipment for power distribution. ELECTRONICS TECHNICIAN NUCLEAR FIELD “A” SCHOOL – This course provides basic knowledge of technical mathematics and a good working knowledge of electricity and electronics, solid state devices, digital logic and systems, microprocessors, and instrumentation and control circuits. Students learn to interpret schematic diagrams and use appropriate test equipment to isolate and correct faults in electronic systems. Strategic
PHYS 222 Worksheet 5 – Electric Potential Supplemental Instruction Iowa State University Useful Equations Leader: Course: Instructor: Date: Alek Jerauld PHYS 222 Dr. Paula Herrera-Siklódy 1/24/12 Wab (Ub U a ) qq U k 0 r q U kq0 i i ri U q V k q0 r q V k i i ri dq V k r Work done by a conservative force Electric potential energy by two point charges q and q0 Potential energy of charge q0 due to the collection of charges qi Potential due to a point charge. Units: [ 1 V = 1 volt = 1 J/C] Potential due to a collection of point charges Potential due to a continuous distribution of charge Potential difference as an integral of E E in terms of V. E is the gradient of V. Vb Va E dl a b E V Diagrams
Rate= k[HSO3-]x[IO3-]y = 0.0005sec-1[HSO3-]1[IO3-]1 Table 2: Time per experiment Experiment | Mixing | 1st trial time (s) | 2nd trial time (s) | Avg time(s) | 1 | #1 and #6 | 37.56 | 33 | 35.28 | 2 | #2 and #7 | 40.54 | 38.53 | 39.535 | 3 | #3 and #8 | 51.08 | 55.79 | 53.435 | 4 | #4 and #9 | 77.00 | 73.50 | 75.25 | 5 | #5 and #10 | 203.00 | 149.19 | 176.095 | Table 3: Calculate moles of HSO3- Test tube numbers being mixed | Volume of HSO3- used | Moles of HSO3-Moles=molarity x liters | #1 and #6 | 10 mL | 0.01 L x 0.001 M = 0.00001 moles | #2 and #7 | 10 mL | 0.01 L x 0.001 M = 0.00001 moles | #3 and #8 | 10 mL | 0.01 L x 0.001 M = 0.00001 moles | #4 and #9 | 10 mL | 0.01 L x 0.001 M = 0.00001 moles | #5 and #10 | 10 mL | 0.01 L x 0.001 M = 0.00001 moles | Table 4: Calculate the rate of IO3- IO3-(aq) + 3HSO3-(aq) I-(aq) + 3SO42-(aq) + 3H+ (aq) Test tube being mixed | Moles of HSO3- | Moles of IO3- reacting | Conc. of IO3- (volume is 20 mL) | Rate of IO3- (conc./avg time) | #1 and #6 | 0.00001 | 3.33 x 10-6 | 1.67 x 10-4 | 1.67 x
Cover Page Student Number: Section B01AM Rotation 1 Room 230 Locker 530 Experiment number 2 Determination of the Identity of an Unknown Liquid Experiment Performed on Tuesday Jan 27 at 2:30 pm Experimental Report submitted on Sunday Feb 1 Purpose The following experiment was conducted to determine the identity of the unknown liquid by measuring its density and its boiling point and comparing these value with those of known substances. Results 1. Density of unknown liquid determined using a graduated cylinder Calculation of the density from trial 1: ρ1=m1v1=10.09g15.1ml=0.668g/ml Calculation of the density from trial 2: ρ2=m2v2=22.88g30.2ml=0.758g/ml Calculation of the density from trial 3: ρ3=m3v3=34.42g45.1ml=0.763g/ml Average of density: ρ=(ρ1+ρ2+ρ3)3=(0.668g/ml+0.758g/ml+0.763g/ml)3=0.730g/ml 2. Density of unknown liquid determined using a volumetric pipette Calculation of the density from trial 1: ρ1=m1v1=7.79g10.08ml=0.773g/ml Calculation of the density from trial 2: ρ2=m2v2=15.46g20.10ml=0.769g/ml Calculation of the density from trial 3: ρ3=m3v3=23.06g30.11ml=0.0766g/ml Average of density: ρ=(ρ1+ρ2+ρ3)3=(0.773g/ml+0.769g/ml+0.766g/ml)3=0.769g/ml 3. Density of unknown liquid determined using a burette Calculation of the density from trial 1: ρ1=m1v1=10.37g13.01ml=0.797g/ml Calculation of the density from trial 2: ρ2=m2v2=20.38g26.01ml=0.784g/ml Calculation of the density from trial 3: ρ3=m3v3=30.01g39.02ml=0.769g/ml Average of density: ρ=(ρ1+ρ2+ρ3)3=(0.797g/ml+0.784g/ml+0.769g/ml)3=0.783g/ml Overall average of density: ρ=(0.730g/ml+0.769g/ml+0.783g/ml)/3=0.762g/ml Boiling point determinations of the unknown liquid Pressure: 101.8 kPa Boiling point from trial 1: 69.0℃ Boiling point from trial 2: 68.0℃ Boiling point from trial 3: 71.1℃ Average of boiling point: (69.0℃+68.0℃+71.1℃)3=69.4℃ According to the table of possible identities of the unknown liquid in
Materials In the Materials section of your Lab Report, list the materials (everything) necessary to get this lab done. C. Procedure The Procedure section of your Lab Report lists instructions or directions needed to accomplish the lab. They are already listed on the paper and do not need to be repeated. D. Data In the Data section of your Lab Report, you will be recording “just the facts” you’ve observed in your experiment. Data may include tabulated numbers, graphs, and short explanations of observations.
Toxic. Toxic. Safety in the Science Classroom For each of the following safety rules, give one GOOD reason why we have that safety rule. a) Never begin an experiment or lab without your teacher’s permission. b) Keep your safety goggles on as long as there are any chemicals being used in the lab, even if you yourself are finished.
Atwood Machine Lab Title: Purpose: The purpose of this lab is to verify the predictions of Newton’s second Law(F=Ma) for the Atwood machine. A machine constructed by hanging two different masses m1 and m2 from a string passing over the pulley and record the acceration Materials: 1. Pulley 2. String 3. Different masses 4.