Cooling Rate of Water 9-20-09 This week’s lab attempted to investigate cooling rate of water. Heat is the total energy of all particles in a substance. Cooling Rate is the rate at which temperature decreases with time. The three variables tested in this lab were the amount of surface area that touched the air‚ the container material‚ and crushed or whole ice. The first hypothesis stated that the water in the small beaker would cool off faster for an unknown reason
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of brown earth. I used my Transformers lunch box to hold the water. First I held the lunch box under a switched off hot tap so that I could tell that the tap did switch off and that there were no drips even though the tap had been switched off. Next I wrote the time(11.23 and 43 seconds) on a sheet of lined school paper with a burgundy coloured crayon. As soon as I saw the time I turned the tap on full and watched how long the tap water took to fill the lunch
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Water Instead of Gatorade http://www.youtube.com/watch?v=DwhTYFwfACA http://www.youtube.com/watch?v=gbu4WY7luLU I’m going to tell you the truth right now. I originally was going to stand up here today and talk to you about Gatorade and encourage you to use it. Well as you can see from the title of my speech‚ that changed. After studying the topic‚ I realized that I had the wrong opinion of Gatorade and other sports drinks. Now I drink my water. Go to any high school‚ college‚ or pro sport
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Water Conservation Student’s Name: Student ID #: Teacher: Due Date: Word Count: For many years‚ water has been treated as a source that will never disappear. Now that it is for sure that we need to make conscience and don’t spend too much water on things‚ the next essay will be written. In some parts of Mexico‚ water has been exploded to its maximum. In places where people have a lot of money‚ more water is used for things. For example‚ in Mexico DF‚ we use 270 L per day‚ this means
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“By the Waters of Babylon” Analytical Essay "It is better to lose one’s life than one’s spirit." John went out of his way to visit the Place of the Gods‚ despite the forest people‚ who could have killed him. Knowledge and truth‚ to him‚ was more important than his own life. “By the Waters of Babylon” has a major theme of ‘our society eats knowledge entirely too fast.” In “By the Waters of Babylon” you will meet John‚ a character who learns through a difficult journey that knowledge can be very costly
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Salt Water or Fresh Water‚ Which Would You Prefer? Many people wonder‚ what big differences are between salt water and fresh water? Is it just water with salt versus water without salt? Those are some common questions people have. Most people ask about the differences‚ but they forget about the similarities of salt water and fresh water‚ as well. Did you know that Salt water and fresh water have very different plant and animal life? There are also a few complex fish that can live in both
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Scaredly‚ I get into the cool water and plop on my water skis and swim over the to the rope and handle. My grandpa‚ excited‚ asks me if i’m ready but I don’t reply cause I am too frightened to even move. He assumes I am ready and started the boat up and yelled “Here we go!”. I really wasn’t ready‚ I was sobbing and kept saying “I can’t”. As the boat started accelerating My knees locked up and I didn’t even get out of the water before I let go of the rope. The second attempt wasn’t as bad because
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were water‚ rubbing alcohol‚ and vegetable oil. I discovered that water could hold the most drops and vegetable oil and rubbing alcohol could hold about the same amount of drops. My hypothesis was if I use water then it will hold more drops than vegetable oil. My hypothesis was supported by my data. The average number of drops for water was 93 whereas the average for vegetable oil was only 36. Obviously water held more as the data shows that not one group had more vegetable oil drops then water drops
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Fresh water always freezes at 0℃‚ but that is not always so for water with salt inside. The higher amount of salt there is in the water‚ the more the freezing point decreases. So‚ salt water freezes later than freshwater. The exact measurement of how they impact each other is this: every 5 psu increase‚ the freezing point decreases by 28%.. In an ocean‚ there is frazil and brine. Frazil are ice crystals suspended in water‚ and they are made of nearly pure freshwater. Frazil is the first stages of
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ESSAY ON WATER & ENERGY CRISIS IN PAKISTAN 1. INTRODUCTION: “Water is precious‚ use it wisely” says a notice placed in the bathroom of a five star hotel in Karachi. There could not be a sounder piece of advice but it should be given not only to the guests of the five star hotels but also to the entire citizenry of Pakistan. Pakistan is rapidly moving to the situation when it will begin to be ranked among the countries that have severe shortages of fresh water. Wise use of this precious resource
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