The extremities are much more sensitive to thermal discomfort from wetness than the trunk of the body. Although local thermal discomfort can be caused from wetness, the thermal comfort of the whole body will not be affected by the wetness of certain parts. Recently, the effects of low relative humidity and high air velocity were tested on humans after bathing. Researchers found that low relative humidity increases thermal discomfort as well as the sensation of dryness and itching. It is recommended to keep relative humidity levels higher in a bathroom than other rooms in the house for optimal conditions.
and Body temp. thermometers representing the air temperature and body temperature. 1. What is the initial air temperature? __32 degrees Fahrenheit____ 2.
Determine the ratio of the heat loss from a 1m3 cylindrical tank of optimum dimensions (that is, the dimensions of the cylindrical tank for which the heat loss is a minimum) to the heat loss from a cubic tank with the same volume. Which tank design do you recommend as being more “environmentally friendly”? Remember: Vcylinder= πr2h SA cylinder= 2πr2+
Heat Absorption Lab Question: Does the color of the object affect heat absorption? Hypothesis: If the color of an object affects how much heat it absorbs, then the darker the color, the hotter the temperature is going to be. The darker colors of an object absorb more heat than lighter colors that reflect heat. Variables: Independent Variable: Color of paper Dependent Variable: Temperature Control Group: The starting temperature of the paper is the control group because it is used to compare how much the temperature has risen from the beginning of the experiment. It is not added to the average.
Answer = The processes of the water cycle not represented were sublimation, precipitation, transpiration, surface run-off, infiltration, and percolation. I don’t believe this model could be altered to include all of these processes unless there were additional specimens and additional testing possibly using soil, plants, ice, water, and a larger jar. 3. How would the “weather” be affected if the water was at a decreased temperature? What about at an increased temperature?
3. How would the “weather” be affected if the water was at a decreased temperature? How would the “weather” be affected if the water temperature were increased? Answer = If the weather decreased in temperature, it would have less condensation on the lid because the temperature would have been less and the water would have no evaporated. Experiment 1: Water Movement POST LAB QUESTIONS 1.
As the number of moles decreases, the volume decreases Summary: Combined Gas Law: PV/nT = constant (T in Kelvins) P1V1/n1T1 = P2V2/n2T2 Ideal gas Law: PV = nRT R = .0821L atm/mol K Gay-Lussac’s/Avogadro’s Law of Combining Volumes Equal volumes of any gases at the same temperature and pressure contain the same number of moles of gas. The coefficients of a balanced equation can be used to calculate relative volumes. Standard Molar Volume: At standard temperature and pressure (STP = 1atm and 273.15K) 1 mole of any ideal gas has a volume of 22.4L Variations on the ideal gas law equation: PV = mRT/M (m = sample mass, M = molar mass of the gas) d = MP/RT (d = density of the gas in g/L) Examples: 1. Calculate: a. The new pressure in a closed container if a 5.0L volume of gas at 2.5atm has its volume increased to 7.5L.
B) Greenhouse gases prevent heat from leaving the earth. C) If the level of greenhouse gases increases, the temperature will decrease. D) Some greenhouses gases are needed to keep the proper temperature balance. E) none of the above 3) Which of the following is TRUE? A) Stoichiometry allows prediction of the amounts of products that form in a chemical reaction based on the amounts of reactants.
A human should have a body temperature of 37°C. If the body temperature drops below 37°C, metabolic reactions become more gradual because molecules move more gradual and have less kinetic energy. If the temperature elevates above 37°C, the enzymes of the body commence to get denatured and metabolic reactions will be much more gradual. Sometime the temperature of our environment is very low enough to decrement your body temperature and other time it is high enough to raise your body temperature. This is why our body has the ability to control its body temperature.
There was a low efficiency rate for this experiment; energy was most likely wasted into the surrounding environment when the burner was alight. Possible ways to improve this experiment would be to possibly do the experiment in a more enclosed space, so as to disallow any heat escaping into the surrounding atmosphere. A fume cupboard would be suitable (when it is not turned on) as there is less movement in the air to move the energy from its intended target. The thermal energy was not only going into the water, but the can of the calorimeter became hot too, meaning that the thermal energy was transferred into the metal surrounding the water, and not just the