| Two small spheres‚ each with mass m = 3.0 g and charge q‚ are suspended from a point by threads of length L = 0.22 m. What is the charge on each sphere if the threads make an angle = 15º with the vertical? | | A) 0.79 C B) 2.9 C C) 75 mC D) 6.3 C E) 0.11 C | | | | Three charges‚ each of Q = 3.2 10–19 C‚ are arranged at three of the corners of a 20-nm square as shown. The magnitude of the electric field at D‚ the fourth corner of the square‚ is approximately
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investigatory project focused on the energy stored on the flashlight which has been charged for the exact hour. The energy stored at the flashlight could either produce light or electrical for the phones to charge. We researchers have guessed that the energy that is stored in the flashlight has a capacity to charge a cellphone. La Salle College of Antipolo Table of Contents Title Page Acknowledgement Dedication Abstract Chapter I Introduction Background of the Study
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Heat: a form of energy Heat In physics and chemistry‚ heat is energy transferred from one body to another by thermal interactions.[1][2] The transfer of energy can occur in a variety of ways‚ among them conduction‚[3] radiation‚[4] and convection. Heat is not a property of a system or body‚ but instead is always associated with a process of some kind‚ and is synonymous with heat flow and heat transfer. Heat flow from hotter to colder systems occurs spontaneously‚ and is always accompanied by an
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Max:60 Scores 1. Three identical charges each +q are placed at the corners of an equilateral triangle of side d cm. Calculate the force on a +ive charge +2q at the centroid of the triangle. 2 2.If the earth is supposed to be a metallic sphere‚its capacity will be nearly (a) 700pf (b) 700 microfarad (c) 700f (d) 6.4 X10^6 f 1score 3. write the relation between dielectric constant and electric susceptibility. 1score 4. A box encloses an electric dipole consisting of charge 5micro C and -5micro C and of
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INTRODUCTION Alessandro Giuseppe Antonio Volta is known as the scientist that founded the electric age. He was an Italian physicist pioneer that contributed greatly to the development of the battery. Alessandro Volta was born in Como‚ Italy in 1745. He attended a public school; in 1774 he was appointed professor of physics at the Royal School in Como. His first invention was an electrophorus; a device that produced static electricity. In 1776-77 he devoted his time to chemistry‚ studying atmospheric
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The Lincoln Electric Company‚ 1996 Background The Lincoln Electric Company is a leading manufacturer of arc-welding and cutting products. Founded by John C. Lincoln in 1895‚ Lincoln Electric began its business with the design of electric motors. John’s younger brother‚ James‚ joined the company in 1909 as a salesman. Almost twenty years after founding the company‚ John C. Lincoln decided to concentrate on being an engineer and inventor‚ and turned the duties of running the company to his brother
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Leaf electroscope.. It is a simple apparatus with which the presence of electric charge on a body is detected (see figure). When metal knob is touched with a charged body‚ some charge is transferred to the gold leaves‚ which then diverges due to repulsion. The separation gives a rough idea of the amount of charge on the body. If a charged body brought near a charged electroscope the leaves will further diverge. If the charge on body is similar to that on electroscope and will usually converge if
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The History of the Electric Guitar The desire to increase the sound of the guitar existed long before the development of electrical amplifiers and speakers. Musical performances in the 19th century were characterized by ever-larger concert settings and ensembles. Musicians needed louder and more powerful instruments‚ which became possible by using new materials and designs. The introduction of steel strings in the 19th century meant not only greater volume‚ but greater tension on instruments
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An electric car is powered by an electric motor instead of a gasoline engine. The electric motor gets energy from a controller‚ which regulates the amount of power transmitted throughout the vehicle‚ based on the driver’s use of an accelerator pedal. The electric motors give electric cars instant torque‚ creating a strong and smooth acceleration pattern. Electric cars are about three times more efficient than cars with an internal combustion engine. A pure-battery electric car uses energy stored
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Compare how poets portray war in The Charge Of The Light Brigade and one other poem In The Charge of The Light Brigade and Mametz Wood‚ both Sheers and Tennyson present similar ideas about war. The reader is given the distinct impression from both poems that the authors think that war is a waste of time‚ unnecessary and pointless. In Mametz Wood Sheers talks about "the wasted young" suggesting that these soldiers that have been found in the farmers field died before their time because of war
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