water used for each trial (100mL)‚ and the amount of drops of food coloring used for each trial (2 drops). These things were necessary to keep the same in the experiment because if they were changed‚ it would skew the data and make it inaccurate. Procedure: 1. Get all materials (150mL beaker‚ food coloring‚ thermometer‚ 100mL of water‚ hot plate‚ stopwatch) 2. Fill beaker with 100ml of water. and measure the temperature of it (21°C right from the sink). 3. Drop two drops of food coloring
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Optimal Growth Conditions and Generation Time for E. coli Introduction The goals of these exercises were to determine the optimal growing condition and the generation time of E. coli. Materials and Methods Please refer to the lab manual for a complete list of materials. To determine the optimal growth condition for E. coli‚ we had to test the environmental factors that could affect the growth. We tested the relative growth of E. coli in the presence and in the absence of oxygen. The results
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of solvent. · Paragraph 2: What could you improve on? (Do you think if someone repeated your lab they would get identical results? Why not? What are some steps you could take to improve the reliability and repeatability of your results?) Point: Although most variables were controlled for‚ the repeatability of this lab could be improved by including the following steps. Make sure the lab is quiet and distraction free at all times. This is important to the experiment because when a scientist
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intermediate work. No 1 2 3 4 5 6 7 8 9 10 190 100 280 400 7000 600 2000 2963.7 Saturated Liquid 60 1750 375 300 4893.1 1800 T (oC) P (kPa) h(kJ/kg) 275 4.00 0.0 Saturated Vapor v(m3/kg) u(kJ/kg) x (quality) Phase description 0.7 Question 2: (20 points) An insulated‚ vertical piston–cylinder device initially contains 10 kg of water‚ 5 kg of which is in the vapor phase. The mass of the piston is such that it maintains a constant pressure of 200 kPa inside the cylinder. Now steam at 0.8 MPa and
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Internal Assesment - Task 2C In this experiment I am investigating the relationship between surface area and the volume of a model cactus and to determine whether this relationship affects the loss of water. We used oasis blocks‚ an absorbant material used by florists as a substitute for a cactus‚ that would soak up the water‚ and thus ideally show the percentage water loss by weighing the before and after evaporation weights. Independent Variable The independent variable is the total surface
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3. The various packaging methods of granulated sugar that is distributed in supermarkets is important to consider because of environmental factors‚ cost-efficiency and customer satisfaction. The consumer is paying for a product and it is the producer’s job to ensure the packaging is effective as well as protective. Two types of granulated sugar packaging methods I will analyze are paper-based packages and re-sealable plastic zipper bags. Paper bags are most commonly used in supermarkets due
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to the center. At the top of Jupiter’s clouds the temperature is around -230 degrees Fahrenheit or -145 degrees Celsius. Jupiter’s temperature increases as you descend closer to the center of the planet. The temperature can increase so much to the point where atmospheric pressure is ten times greater than that on Earth and the temperature is 21 degrees Celsius which scientists call “room temperature.” This part of Jupiter is believed to possibly be able to support life‚ which would have to float and
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The simulation and analysis of liquid droplets with respect to heat capacity and droplet size Abstract Define Using Molecular dynamic simulation a cluster of particles was modelled and their behaviour analysed with respect to temperature change. As proof of a specific state i.e. solid‚ the Mean squared displacement was calculated and illustrated with respect to time. This occurred for varying temperatures. From the internal energy of the system per time step‚ the heat capacity was determined
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Evaporation and Transpiration Evaporation and transpiration (evapotranspiration) are components of hydrologic cycle‚ which at principle‚ can be calculated from meteorological observations such as temperature‚ humidity‚ radiation‚ wind speed‚ etc. The process‚ however‚ is quite complex and a substantial literature has been produced on it. In this chapter our focus is mainly on the concept and simple estimations of evaporation and transpiration. Mechanism of evaporation from water surfaces Here
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subtract the temperature of the psychrometer from the starting temperature and that is the difference. Then you must look at the humidity in the black text book to determine the relative humidity. A psychrometer is an instrument designed to measure dew point and relative humidity. 3. Evaporation is a cooling process because heat is taken out of water when the process occurs. Energy is used to break the bonds that hold water molecules together‚ which is why‚ water easily evaporates. The humidity level
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