Heat capacity Lab Report Example | Topics and Well Written Essays - 750 words

Heat capacity - Lab Report Example The heat energy that is lost by the hotter object is absorbed by the object with the lower temperature. Calculating specific heat capacities involves the use of a calorimeter and a known mass of water. The calorimeter is designed in such a way that heat is not lost to or gained from the surrounding air (Laider). Since no heat is lost, then it can be safely assumed that heat lost or gained by the object inside the calorimeter is the same as the heat lost or gained by the water contained in the calorimeter. A known mass of water was heated using an electrical heating wire. The initial and final temperatures of the water were measured and recorded, as well as the current, voltage and the time that the electric switch was turned on. For liquid nitrogen, a known amount of heat was applied to liquid nitrogen. The quantity of liquid nitrogen that boiled away was measured by finding the difference between the initial and final masses. The flask with the liquid nitrogen was placed on a balance and the electrical heater lowered into the liquid nitrogen. The vaporization rate of the liquid nitrogen was measured after every ten seconds and recorded. Temperature (T) was plotted against time. The change in temperature was then used in the calculation of Cwater. (IVT)/ ΔT was plotted against the mass of water. The slope of the curve was found to be Cwater: From (IVT)/ ΔT, the value of IVT can be calculated by replacing ΔT in the equation (IVT)/ ΔT with the value in the table that corresponds to ΔT and then solving for (IVT). This gives a value of 50240.1601. The specific heat capacity of water of successfully determined, along with the latent heat of vaporization for liquid nitrogen. The measured and calculated results may have errors because of the possibility that experimental errors occurred during heat transfer to the surrounding and also not taking the

Research proposal letter Assignment Example | Topics and Well Written Essays - 500 words

Research proposal letter - Assignment Example This is what will be experienced by people once the marijuana is legalized as there will be continual usage of the drug. Similar to other hard core drugs, continual usage of marijuana will cause damage to the brain leading to problems such as psychosis in addition to diminished brain functions and affecting the memory. If people’s brains are likely to be destroyed, it means that the state will lack productive people in the future and that will be the beginning of the end of this great state. Unborn babies who are the future generation of this great land will also be affected by the marijuana even while in the womb. It is open fact as explained by Kleber and Dupont in their research findings that medical marijuana is of great help to people with glaucoma, epileptic seizures, decreases anxiety, prevents the spread of cancer and is even a powerful painkiller among other health benefits. This therefore means that it cannot be prevented from being used for medical purposes. The solution to such an issue is to therefore only legalize medical marijuana. There should be law indicating that people to produce medical document signed by the physician about the need to use the medical marijuana in the specific shops selling the drug. The sellers should have official permits from the county offices to legalize their sale and regular checks will be made in their shops to ensure they are not breaching their contracts. This legalization will cost less than when the regular marijuana is legalized. The cost of medical expenses will also reduce to the sick people are they will reduce their frequent hospital visi t and purchase of expensive drugs. This is not expected to be an easy thing as people will still find ways to forge documents so they can purchase the marijuana even though they lack pre-existing medical condition to demand the use of the drug. There are also activists who are bound to reject even the legalization