fdsgdsfgdsfgsdgdsgsdfEssay 1.(a) State experimental evidences for i) strong repulsive force ii) strong attractive force between atoms in a solid. (b) A simple model for the oxygen molecule consists of two equal masses connected by a light spring . The atoms oscillate along their lines of centre while the midpoint of the spring remains fixed. i) Write down an expression for the frequency of oscillation of one oxygen atom in terms of its mass m and the force constant K of
Premium Chemical reaction Chemistry Oxygen
Kenny hill 4.6.11 Period: 2 Partners: Perla Garibay Jorge Rivera Building an energy pyramid activity Purpose: students will gain an understanding of how energy flows through an ecosystem by constructing an energy pyramid and calculating how much energy is transferred between trophic levels Materials:*energy pyramid template‚ species list‚ pyramid data sheet‚ calculator‚ one 1‚000ml beaker‚ 3 clear cups‚ one 1ml pipette‚ pen or pencil Question: how much energy is transferred from one
Premium Energy Thermodynamics Heat
Year 10 MYP Chemistry Investigating Thermoregulation Research Question. How does varying the surface area to volume ratio (2.0046: 1‚ 1.4923: 1‚ 0.9425: 1‚ 0.6480:1‚ 0.5970:1) affect the amount of heat lost over a period of 6 minutes of 50cm3 water with a temperature above 50? b. Prediction and Hypothesis. Make a prediction about what you expect to be the outcome. Explain your prediction using scientific ideas. I predict that the bigger the surface area to volume ratio‚ the lesser
Premium Heat Temperature Thermodynamics
D. F. Nachman Thermochemistry: An Ice Calorimeter Determination of Reaction Enthalpy 9/11/2014 Introduction: A chemical reaction often indicated by a transfer of energy measured in heat. By measuring this heat transfer in a constant pressurized environment‚ the enthalpy of the reaction can be used to infer certain information about a specific reactions reactants and products. The transfer of heat from outside sources in would be described as an endothermic reaction. Contrary‚ when
Premium Thermodynamics Energy Enthalpy
1. Suppose that an open box is to be made from a square sheet of cardboard by cutting out 6-inch squares from each corner as shown and then folding along the dotted lines. If the box is to have a volume of 486 cubic inches‚ find the original dimensions of the sheet of cardboard. 2. A toy rocket is shot vertically upward from the ground. Its distance in feet from the ground in 5 seconds is given by s(t) = -16t2 + 169t. At what time or times will the ball be 162 ft. from the ground? Round your
Premium Velocity Classical mechanics Acceleration
P9/M4- Determination of Abstract: The aim of this experiment was to find out which alcohol burner was the most efficient when heating up water. The different alcohol burners were placed under cans full of 100cm3 of water one after the other. There was a thermometer placed in the can‚ which measured the temperature change during the experiment. It was noticeable that the most efficient alcohol burner was Octan-1-ol as its average was 16.4KJ whilst most other burners were less than 10KJ.
Premium Thermodynamics Water Temperature
Lindsay Foreman 3-2-12 3-6-12 Humpty Dumpty Challenge Introduction: The purpose of this experiment is to determine the most efficient air bag that will protect Humpty when he is dropped. When talking about the most efficient air bag we are talking about using the least amount of chemicals to make the most carbon dioxide to inflate the bag. We hypothesized that a small amount of sodium bicarbonate with a small amount of acetic acid will create enough carbon dioxide to inflate the bag so Humpty
Premium Aerodynamics Thermodynamics Test method
Factors Affecting Enzyme Activity Abstract: In the following lab factors affecting enzyme activity‚ temperature‚ pH‚ enzyme concentration‚ substrate concentration and surface area will be tested on a beef liver enzyme to see if there will be any effect of performance. By doing 2 or more trials the results will show whether there is an effect to the enzyme from the following factors or not. Some of the factors may denature the enzyme and some will do nothing. Using a table qualitative and the
Premium Enzyme Chemical reaction Chemical equilibrium
Chapter 18 Vocabulary • Energy Efficiency- Percentage of the total energy input that does useful work and is not converted into low-quality‚ usually useless heat in an energy conversion system or process. See energy quality‚ net energy. • Incandescent Light Bulb- One largely used devices that uses large amounts of energy‚ wastes 95% of its energy input of electricity • Internal Combustion Engine- Another device that uses a lot of energy‚ wastes 75%-80% of the energy in its fuel • Coal-Burning
Premium Energy Energy conservation Thermodynamics
Engineering Materials Week 9 12.11 Iron titanate forms in the ilmenite crystal structure that consists of an HCP arrangement of ions. (a). Which type of interstitial site will the ions occupy? Why? Since this ratio is between 0.414 and 0.732‚ the ions will occupy octahedral sites (b). Which type of interstitial site will the ions occupy? Why? Since this ratio is between 0.414 and 0.732‚ the ions will also occupy octahedral sites. (c). What fraction of the total tetrahedral sites will be occupied
Premium Solid Temperature Ion