acid) *Bunsen burner (to heat the acid to the right temperature) *Test tubes (to hold first experiment in) *Hydrochloric acid (the acid being used) *Powdered limestone (the substance being used) *Triangular stand (to hold the Bunsen burner) *Timer (to time the reaction) *Thermometer (to record the temperature) Diagram Possible Variables The possible variables are: *Temperature of acid- this will determine how quickly the reaction happens e.g. the limestone reacts faster or slower under
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Week #3 Journal Assignment Chapter 7 Transportation has long been a necessity since the founding of our 200 year old nation. From the days of the first horseback riders delivering necessary information‚ medical supplies‚ food etc. As our country has continued to develop into a shining example for the world‚ we have made significant improvements in our transportation means from horseback to early cars‚ trains‚ airplanes‚ etc. But with the introduction of the technology age our country has
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Science Fair Checkpoint #3 Materials: Disposable Gloves Timer Test tubes Thermometer Steel Wool Scissors Ruler Lemon Juice Orange Juice Vinegar Distilled Water Four Small Bowls Thin Towel Tall plastic cup Graph Paper Procedure: Before beginning your experiment‚ make sure that the distilled water has been opened and exposed to the air for at least a few hours. This will allow it to absorb some carbon dioxide from the atmosphere and lower its pH from a level of about 7 to about
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defined: It is contains the data that are ready to be send. The lower limit in transmitter window which is waiting for acknowledgement is Slast .The upper limit frame in transmitter window is Slast + ws -1.Also each transmitted frame is allocated by a timer that when itès expire sender determines to retransmit that frame. On the other side‚ receiver pointer is pointing to the next expecting frame by Rnext. R next goes forward by each error free frame. To have an accurate transitions receiver request
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operations. System call provides the means for a user program to ask OS to perform OS tasks on the user program’s behalf. When a system callis executed‚ it is treated by H/W as a S/W interrupt. Timer protects CPU resource from getting stuck by a user program. To ensure OS maintains control over the CPU‚ a timer can be set to interrupt the computer after a specified period. Use it to prevent a user program from running too long. 1.6 A process is a program in execution. It is a unit of work in the system
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Error analysis: 1. The scale could have been off. 2. Burnt the magnesium. 3. Didn’t let the magnesium fully react with the oxygen. Can be fixed by: 1. Resetting the scale and checking it often. 2. Watch the magnesium and use a timer. 3. Use a timer to make sure reaction is fully done. Conclusion: When magnesium reacted with oxygen it turned to a white/grey powder known as magnesium oxide. This increased the mass by 5 grams. The magnesium fully reacted with the oxygen‚
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flame‚ if current is present the main gas valve stays open and heat exchanger begins to warm up. 8. Most high efficiency furnaces then use an electronic timer on the circuit board to start the blower after the burners are proved. 9. Thermostat opens when desired temperature is reached. 10. The gas valve closes‚ burners extinguish‚ and the timer starts
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The story To Build a Fire demonstrates possible dangers of traveling in the Yukon under extreme cold. Through a young man‚ Jack London depicts the consequences of ignoring instinct and survival advice. The man travels with a dog‚ who can perceive the dangers of the freezing wilderness. The reader learns of the man’s personality through descriptive words and phrases while journeying through the story. At the beginning of the story the man turned aside from the main trail. He stopped at the top
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beaker from the other. Before beginning the experiment‚ use the thermometer to check the Fahrenheit temperature of each beaker to ensure the temperature difference. Next‚ grab the timer and the blue food coloring. At the same time‚ drop 1 dropper full of blue food coloring (see Figure 2.) into each beaker and begin the timer. Observe the beakers and document the time and temperature of complete diffusion in each
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4 Results and Discussions 4.1 Assessing illuminance levels The detailed measurements of illuminance are shown in Appendix 3.Point illuminance recorded for each of the area mentioned in this chapter is presented on the AutoCAD plans in Appendix 4. 4.1.1 Average illuminance Figure 4 1: Illuminance levels measured in different areas As illustrated in Figure 4-1‚ the general illuminance for the different areas in the building are satisfying the benchmarks imposed by CIBSE L7 regulations and ISO
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