4 ) Every temperature measuring instrument makes use of specific physical property in order to measure temperature objectively . Which physical properties are used in thermocouple , PT sensors and mercury - in - glass thermometer ? Briefly describe each of this methods
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4 ) Every temperature measuring instrument makes use of specific physical property in order to measure temperature objectively . Which physical properties are used in thermocouple , PT sensors and mercury - in - glass thermometer ? Briefly describe each of this methods.
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- To determine the thermal conductivity of a structural material, a large 15-cm-thick slab of the material is subjected to a uniform heat flux of 2500 W/m2 while thermocouples embedded in the wall at 2.5 cm. intervals are read over a period of time. After the system had reached equilibrium, an operator recorded the thermocouple readings shown below for two different environmental conditions: Distance from the Surface (cm) Temperature (C) Test 1 0 40 5 65 10 97 15 132 Test 2 0 95 5 130 10 168 15 208 From these data, determine an approximate expression for the thermal conductivity as a function of temperature between 40 and 208C.1. Choose the material that is brittle, a poor thermal conductor, a good thermal insulator, and can withstand high temperatures. a. Ceramics b. Composites c. Polymers d. Metals 2. Choose the substance with the greatest surface tension. a. C9H20 b. C12H26 c. C6H14 d. C24H50 3. Condensation polymers A. Are deposited in molds by condensing vapors B. Also release a small molecule such as water when they are formed C. Usually are made from monomers containing one or more C=C bonds D. None of the AboveWhich of the following is FALSE regarding the continuum assumption of fluids? Select one: a. Uncertainties within the molecular properties of the fluid will be neglected b. Limit concepts can be applied on fluids c. Fluids with same composition may have different properties d. The fluid will be analyzed in the macroscopic level Which of the following does NOT describe a difference between liquids and gases? Select one: a. Liquids form a free surface while gases do not b. Liquids have lower bulk modulus of elasticity than gases c. Specific gravities of liquids are higher than gases d. Viscosity of liquids decreases as temperature increases while on gases, viscosity increases with temperature
- The principles of Newton’s Law of Cooling. You can imagine and create your own data. Discuss the nature and origin of the four (4) types of coffee where it originates. Various settings, formulations, containers, and the number of trials will be properly discussed in their methodology. Once the experimentation has been done, the thermal coefficient shall be computed and recorded. The temperature coefficient acquired at t=0 and t= 5 mins, will be tested at t = 6,7,8,9 and 10 minutes.After the sinking of RMS Titanic, US operated the International Ice patrol with the purpose of monitoring the presence and movements of icebergs in the Atlantic and Arctic oceans. Once, they observed a unique tabular iceberg in a form of a rectangle (250 km x 50 km x 300 m). How many years would it take to melt the iceberg solely by heat from the sun if the ice absorbs a mean of 98 J/m2 -s, 12.5 hrs per day? Note: the exposed area for heating is 250 km x 50 km and the density is 920 kg/m3 . This is my solution.An open vessel containing liquid water stands in a sealed room measuring 3.0m wide x 3.0m long x 3.0m high. The temperature of the room is 300K and, over time, some of the liquid water evaporates. Eventually, the liquid water level in the vessel stops changing. How many grams of water will be in the humid air within the sealed room? Show all work
- Given the following: Cp of Br: 0.226 J/g-K BP of Br: 59 deg C density of Br: 3.12 g/mL Hvap of Br: 30,900 J/mol V of liquid Br solution: 50 mL Cp of Br2: 0.473 J/g-K What is the total heat required in heating Br from 25 to 75 deg C?For a specified heat input and a given volume which material will have the smallest tempera- ture rise (Use data book if necessary) (a) steel (b) aluminium (c) water (d) copper. When a hot metal piece is left to cool in air the time rate of cooling of the outer layer will be (a) slower at start and faster near the end (b) faster at start and slower near the end (c) both rates will be the same (d) this will depend on the material. (viii) A thin black plate at temperature T receives radiation from a surface at Temperature T1 and radiates to a surface at T2. If all surfaces are black at steady state (a) (T1 – T) > (T – T2) (b) (T1 – T) < (T – T2) (c) (T1 – T) = (T – T2) (d) can be any one of a, b or c. (ix) The temperature profile (in) a slab initially at a constant temperature and then allowed to cool by convection for a short time will be as shown in Fig : (a) E1.2a (b) E1.2b (c) E1.2c (d) E1.2d. Tia) The number of kilocalories in food is determined by calorimetry techniques in which the food is burned and the amount of heat transfer is measured. How many kilocalories per gram are there in a 5.00-g peanut if the energy from burning it is transferred to 0.500 kg of water held in a 0.100-kg aluminum cup, causing a 54.9C temperature increase? (b) Compare your answer to labeling information found on a package of peanuts and comment on whether the values are consistent.
- Please help and answer completely, i will surely give a good feedback. Thank you. Refer to the picture attached. The following pressure, temperature and specific humidity measurementswere made from radiosonde soundings on day 11 of the Wangara PBLexperiment: A. Characterize the various layers on the basis of local and nonlocal stability and discuss the differences between the two. B. Estimate the height of the inversion base (zi), as well as the PBL height (h). Discuss the sensitivity of the latter to the near-surface temperature. Answer in the format of Given, Required, & Solution.RTD calibration How do you determine the error in temperature measurement?A core was mounted in a gas permeameter to measure permeability. Determine the liquid permeability (mD) of the core using gas (in oilfield units). The laboratory data are as follows: Diameter of the core = 3.78 cm Length of the core = 7.63 cm Gas viscosity = 0.0148 cP Flow rate = 9.07 cm3/s P1 = 1.439 atm P2 = 1.086 atm