Thermochemistry Lab Purpose: This lab taught procedures for determining heat of capacity of a calorimeter and measuring enthalpy of change for three reactions. It also enforced methods of analyzing data obtained through experimentation and calculating enthalpy. These procedures are used in the branch of thermodynamics known as thermochemistry which is the study of energy changes that accompany chemical reactions. Concepts from this lab can be used to determine the potential energy of a chemical
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INTRODUCTION If an electric current flows through a conductor in a magnetic field‚ the magnetic field exerts a transverse force on the moving charge carrier which tends to push them to one side of the conductor. A buildup of charge at the sides of the conductors will balance this magnetic influence‚ producing a measurable voltage between the two sides of the conductor. This presence of measurable transverse voltage is the Hall Effect. The Hall effect was discovered in 1879 by Edwin Herbert Hall
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International Journal of Medical and Biological Sciences 6 2012 Estimation of Electromagnetic Radiation from Base Station Antenna R. K. Singh Abstract—In the present paper‚ an observation of electromagnetic radiation from base station antennas installed for various communication purposes has been done on the basis of equivalent isotropically radiated power (EIRP) calculations. For this purpose‚ a typical wireless communication site has been selected where GSM‚ CDMA‚ 3G/UMTS and WiMAX antennas are
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1.) The two major tasks performed by an ignition system ate to ____ and to _____. A.) Provide sufficient electrical voltage and to discharge a spark between electrodes of the spark plug. 2.) If a four-cycle engine runs at 3600 rpm‚ and the number of sparks per minute required at the spark plug would be ______per minute. A.) 1800 3.) Name the six main electrode components that make up the magneto ignition system. A.) Permanent magnets‚ High tension coil‚ Mechanical or electronic
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Class X‚ PHYSICS‚ "Electricity" Definitions 1. Insulators Those material objects that do not allow charge to pass through them are known as Insulators or non-conductors. 2. Conductors Those material objects that allow the charge to pass through them are called conductors. 3. Semi Conductors Those material objects that allow some charge to pass through them are called Semi-Conductors. 4. Free Electron Those electrons that are loosely bound by their atom and can move freely
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Describe the main features of a DC electric motor and the role of each feature Part | Description | Role | Magnet(s) | Either permanent or electromagnetic. Induce a magnetic field and fit around the armature. | The magnets supply the magnetic field which interacts with the current in the armature to produce the motor effect. | Armature | The armature consists of a cylinder of laminated iron mounted on an axle. Often there are longitudinal grooves into which the coils are wound. | The armature
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Electromagnetic waves in space See the book “Optics” by Hecht sections 3.2 and 3.3 Speed of light: EM waves travel in a vacuum with speed c = c = 299‚792‚458 ms-1 exactly They are transverse waves with (vector) E and B field orthogonal to each other‚ for this section bold indicates vector quanties. When far from the source (many wavelengths) the E and B fields are in phase The vector E x B points in the direction of motion Travelling waves can be written as E = E 0 ⋅ ei ( kx −ωt ) and B = B 0 ⋅ ei
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Question 1.1: What is the force between two small charged spheres having charges of 2 × 10−7 C and 3 × 10−7 C placed 30 cm apart in air? Answer Repulsive force of magnitude 6 × 10−3 N Charge on the first sphere‚ q1 = 2 × 10−7 C Charge on the second sphere‚ q2 = 3 × 10−7 C econd Distance between the spheres‚ r = 30 cm = 0.3 m Electrostatic force between the spheres is given by the relation‚ Where‚ ∈0 = Permittivity of free space Hence‚ force between the two small charged spheres is 6 × 10−3 N.
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Electromagnets! An electromagnet is a type of magnet in which the magnetic field is produced by the flow of electric current. The magnetic field disappears when the current is turned off. Electromagnets are widely used as components of other electrical devices‚ such as motors‚ generators‚ relays‚ loudspeakers‚ hard disks‚ MRI machines‚ scientific instruments‚ and magnetic separation equipment‚ as well as being employed as industrial lifting electromagnets for picking up and moving heavy iron objects
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Technology A new Approach to High-Power Energy Harvesting is proposed to convert mechanical to eleclterical energy based on reverse electrowetting [1] . This energy generates through a novel microfluidic phenomenon. Reverse electrowetting is a process by which liquid motion is converted into electrical energy. It can generate a power up to 103Wm−2‚ by this technology. Reverse electrowetting (REWOD) concept At first‚ The principle of electrowetting is defined in here. The shape of a liquid droplet
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