The first speaker ever created was known as the dynamic loudspeaker. It was created in the 1920’s by Edward Kellogg and Chester Rice. The loudspeaker produces a magnetic field which then causes a coil or magnet to move. The coil or magnet is connected to the diaphragm. There are more speakers than just the horn‚ such as‚ such as‚ electrodynamic loudspeaker‚ flat panel - planar‚ electrostatic‚ multi-cell diaphragm and piezoelectric. Speakers are used to produce sound. Sound is an energy which is
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the 1900’s‚ the overall death rate of the population in Britain has decreased. For males‚ the death rate has dropped from 25829 in 1901 to a mere 8477 in 2000. The rate fell from 21705 to 5679 within the same period of time for females. It was noted that death rates increased during flu epidemics as well as in cold and hot weather. For example‚ about 200 000 people died in the year 1918 due to the influenza epidemic. Nowadays‚ more people die after the age of 65 while in the early 1900’s‚ only 20%
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in my life was not having the “normal” family that most kids seem to have growing up. I never had the family where the mom bakes all the time and takes her kids to soccer practice and drives a mini van‚ while the dad doesn’t come home until later at night just to help his kids with their homework and tells them goodnight while him and his wife talk about their day apart. Instead‚ I was the girl that had the parents that always fought about my mother’s drinking problem and how she was single-handedly
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healthy five-week old albino Sprague Dawley® Outbred rats: (24 females) and (24 males) purchased from Taconic Biosciences‚ Inc. one month prior to the experiment. The rats were purchased one month prior so that they can be examined by a veterinarian to make sure they are healthy before the start of the experiment. Once the rats were deemed to be healthy they were then separated into their according groups in order to start the experiment. The female rats were separated into four groups‚ three experimental
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or hourly wages would be equivalent to. 1. Suppose a winter jacket costs $80 in 2003 and inflation was measured at 27% over the period from 2003 to 2013. If all other variables were to remain constant‚ how much would that jacket cost in year-2013 dollars? Use the inflation formula below to complete this calculation:
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amendment - The 19th amendment was passed on August 18‚ 1920. This amendment gave women the right to vote‚ it made women equal to men in the political eyes. This happened after Tennessee legalized women’s rights as the 35th state. Since‚ it was the 35th state that passed this law making the two-thirds law kick in as majority rules. Women’s rights marches - This was marches that women suffragist did to spread the word about women’s oppressment. The biggest march was in 1913 started by Alice Paul
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RAT POW Problem Statement: I this POW we were assigned to find the population of the exponential growth of a rat population‚ residing on a perfect‚ utopian island after a year. Organisms will flourish prosperity on the Island and no deaths would occur. The journey began when merely 2 full-grown rats‚ the one original male and female‚ arrived on the island. Their offspring would be determined by the following: Every day from January 1st‚ the original mother would give birth to a liter of
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3.1 Metabolic Load: The metabolic activities inside human body constantly create heat and humidity (i.e. perspiration). This heat passes through the body tissues and is finally released to the cabin air. This amount is considered as a heat gain by the cabin air and is called the metabolic load. The metabolic load can be calculated by Qmet = Σ MADU Passengers Where M is the passenger’s metabolic heat production rate. (It is assumed from ISO 8996 based on various criteria for driver: M = 85 W/m2
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Black Rat Biology Honors Paper The Rattus Rattus (black rat) is one of the most problematic invasive species in the world. Covering 80% of all archipelagos and are found on six continents. Black rats are mainly found on tropical islands such as the Galapagos‚ Hawaii and most of the islands in Central America. Rats prefer to live in areas filled with forests and shrubland‚ but can live on minimal vegetation. Scientists have been able to exterminate this invasive species from most temperate and sub
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EFFECT OF INTEREST RATE ON FOREIGHN EXCHANGE RATE (EVIDENCE FROM ASIAN REGION) ABSTRACT: In this article we investigate the impact of a change in U.S. short term interest rates relative to those in some Asian countries like Bangladesh‚ Thailand‚ Japan‚ Pakistan‚ and China on the bilateral foreign exchange rates between the U.S dollar and each country’s currency. Several factors determine the exchange rate of a country. A higher currency makes a country’s exports more expensive and imports cheaper
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