DESIGN AND CONSTRUCTION OF A SPOT WELDING MACHINE A project report submitted to the Department of Mechanical Engineering‚ Khulna University of Engineering & Technology in partial fulfillment of the requirements for the degree of ―Bachelor of Science in Mechanical Engineering‖ SUPERVISED BY: SUBMITTED BY: Dr. Naseem Ahmed Professor Department of Mechanical Engineering KUET Md. Musaddiq Reza Roll no. 0605078 Raihan kabir Roll no. 0605084 DEPARTMENT OF MECHANICAL ENGINEERING
Free Welding
order to illustrate the type of chemical reaction (oxidation-reduction) that occurs in batteries.[6][7][8] The zinc and copper are called the electrodes‚ and the juice inside the lemon is called the electrolyte. There are many variations of the lemon cell that use different fruits (or liquids) as electrolytes and metals other than zinc and copper as electrodes. Use in school projects[edit] There are numerous sets of instructions for making lemon batteries and for obtaining components such as light-emitting
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toward Ni(s) (2) 2. Which processes occur during the electrolysis of molten sodium chloride? I. Sodium and chloride ions move through the electrolyte. II. Electrons move through the external circuit. III. Oxidation takes place at the positive electrode (anode). A. I and II only B. I and III only C. II and III only D. I‚ II and III (2) 3. What happens to the Cr3+(aq) ion when it is converted to CrO (aq)? A. Its oxidation number decreases and it undergoes reduction. B. Its oxidation number
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Origin of the ECG signal Shi Zhu Department of Computer and Electrical Engineering University of Ottawa Ottawa‚ Canada Szhu060@uottawa.ca Abstract—the technical report paper mainly introduces the concepts of heart and ECG signal and how the blood flow through the heart from the entrance of the heart to the entire body. Also‚ this paper describes some procedures of electrical activation of the heart and the genesis of the electrocardiogram like polarization and depolarization waves. That the point
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redox peak was observed. The modification of PEDOT-GO and PEDOT-rGO were increase in increase in the redox reak compared with bare electrode. The incorporation of LAC on the PEDOT-rGO gives decrease in the oxidation and increase in the reduction because of o-dopaquinone is changed as dopamine enzymatic oxidation. The increase in the reduction peak current of enzyme electrode is due to reduction of more o-dopaquinone convert to dopamine by 2e- transfer process. Thus the modification
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accurate technique in which electrolysis of experimental solution is carried out by using one electrode of comparatively large surface area (i.e. non-polarisable electrode) and the other electrode having a very small area (polarisable electrode). The non polarisable electrode is SCE used as reference electrode. Alternatively Hg pool can be used where the polarisable electrode consist of dropping mercury electrode (DME) During electrolysis potential difference is applied to the cell and it is kept on
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welding is a process utilizing the concentrated heat of an electric arc to join metal by fusion of the parent metal and the addition of metal to joint usually provided by a consumable electrode. Either direct or alternating current may be used for the arc‚ depending upon the material to be welded and the electrode used. Electroslag Welding Electroslag Welding (ESW) deposits the weld metal into the weld cavity between the two plates to be joined. This space is enclosed by water cooled copper
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solution‚ being decomposed in the process. Electrode a rod or plate where electricity enters or leaves electrolyte during electrolysis. Reactions occur at electrodes. Discharge the removal of electrons from negative ions to form atoms or the gain of electrons of positive ions to become atoms. Anode positive electrode connected to positive terminal of d.c. source. Oxidation occurs here. Anode loses negative charge as electrons flow towards the battery‚ leaving anode
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Voltage supplied to the electrodes however can be easily changed and adjusted. Thus this experiment will attempt to find the relationship between Voltage applied to the electrodes and the rate of electrolysis. What is the relationship between Voltage supplied and rate of electrolysis? Variables and definitions The rate of electrolysis is defined as mass of Cations of the electrolyte produced at the cathode per unit of time. Independent variable – Voltage supplied to the electrodes (V) Dependent variable
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Cyclic voltammogram of the unknown solution of ferricyanide. 20mV/s scar rate was used. The working electrode was glassy carbon‚ the reference electrode was Ag|AgCl‚ and the auxiliary electrode was a platinum wire. Table 2. Data for determining the concentration of the unknown ferricyanide solution Peak Current (A) Calibration Line Cathodic 3.34E-05 y=5.81E-06x-3.20E-06 Anodic -1.85E-05 y=-3.50E-06x-2
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