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- When lead is melted at atmospheric pressure, the melting point is 327.0 °C, the density decreases from 1.101 × 104 to 1.065 × 104 kg/m³, and the latent heat is 24.5 kJ/kg. Estimate the melting point of lead, T, at 41 atm. P - Select one: a. 327.164 °C b. 326.836°C O c. 327.096 °C O d. 326.409 °C1. A walrus transfers energy by conduction through its blubber at the rate of 165 W when immersed in -1 deg C water. The walrus's internal core temperature is 36.5 deg C, and it has a surface area of 2 m². What is the average thickness of its blubber, which has the conductivity of fatty tissues without blood (k=0.2 J/(s m °C))? d= cm8. IP A constant-volume gas thermometer has a pressure of 80.3 kPa at -10.0 °C and a pressure of 86.4 kPa at 10.0 °C. (a) At what temperature does the pressure of this system extrapolate to zero? (b) What are the pressures of the gas at the freezing and boiling points of water? (c) In general terms, how would your answers to parts (a) and (b) change if a different constant- volume gas thermometer is used? Explain.
- Q3/ Determine the parameters of a module formed by 44 solar cells in series, under the operating conditions G=1000 W/m?, and Ta=34°C. Manufacturers values under standard conditions are: Isc=3A, Voc=20.4V, Pmax=65.9 W, NOCT=43°C.A steam pipe is covered with 1.50-cm-thick insulating material of thermal conductivity 0.200 cal/cm . °C . s. How much energy is lost every second when the steam is at 200.°C and the surrounding air is at 20.0°C? The pipe has a circumference of 800. cm and a length of 50.0 m. Neglect losses through the ends of the pipe.C=3.0*10°ms", m,=1.673*10"Kg, mn=1.675*102"Kg, Re=1.097*10'm, K=9*10°Nm°c?, F=9.6485309*10°Cmol', mol", la.m.u.=1.660569*10²" kg. ao=5.29*10'"m e=1.6*101°c, Eo=8.8*10-12Asvm², m,=9.1*103"Kg, h=6.62*10*Js, h/2T=1.05*10Js, NA=6.022045*10²3 -27 1-Find the atomic mass of the following elements CI, O and Pb; if M(CI)=35.45g, M(0)=16.00g and M(Pb)=207.20g? М(celement) m, atom N. 2-Find the radius of the nuclei of the following elements 1"1, 13Cs and 238U? "'muet = (1.3)A/3 *10-1$ m
- For a single pane window, as shown the thermal conductivity 1.4 W/m.k., the R-value for the window is 15°C 30°C Glass 1 m 1.8 m. 8 mm Select one: a. 0.2259 m2.K/W b. 0.1158 m2.K/w c. 0.0057 m2.K/W2. A platinum bar increases in length by 0.2% when its temperature increases to 222OC.a. Draw the figure and reflect the increase in length and increase in temperature.b. Determine the coefficient of linear expansion of platinum? Note: Write the given data and the required quantity. Write the formula and solve for the required quantity. Encircle or box the final answer.11. You are asked to design a cylindrical steel rod 0.50 m long, with a circular cross section, that will conduct 150.0 Jls from a furnace at 400 °C to a container of boiling water. What must the rod's cross sectional area be? Note the thermal conductivity of steel is 50.2 W/m K. * A. 0.00498 cm^2 O B. 0.498 cm*2 O c. 37.4 cm^2 O D. 49.8 cm^2 O E. 4980 cm^2
- Two 50-g ice cubes are placed into 0.2kg of water in a Styrofoam cup. The water is initially at a temperature of 25C and the ice is initially at a temperature of -15C. What is the final temperature of the drink? The average specific heat for ice between -15C and 0C is 2.05kJ/kgC. a. 12.35 deg C b. 10.6 deg C c. 20.2 deg C d. 15.5 deg C A tire with an inner volume of 0.025 m^3 is filled with air at a gauge pressure of 36psi. If the tire valve is opened to the atmosphere, what volume outside of the tire does the escaping air occupy? Some air remains within the tire occupying the original volume, but now that remaining air is at atmospheric pressure. Assume the temperature of the air does not change. a. 0.086 m^3 b. 0.096 m^3 c. 0.868 m^3 d. 0.673 m^3 The water passing over Victoria falls, located along the Zambezi River on the border of Zimbabwe and Zambia, drops about 105 m. How much internal energy is produced per kilogram as a result of the fall? a. 1030.05 b. 1260.05 c.…Two 50-g ice cubes are placed into 0.2kg of water in a Styrofoam cup. The water is initially at a temperature of 25C and the ice is initially at a temperature of -15C. What is the final temperature of the drink? The average specific heat for ice between -15C and 0C is 2.05kJ/kgC. a. 12.35 deg C b. 10.6 deg C c. 20.2 deg C d. 15.5 deg C A tire with an inner volume of 0.025 m^3 is filled with air at a gauge pressure of 36psi. If the tire valve is opened to the atmosphere, what volume outside of the tire does the escaping air occupy? Some air remains within the tire occupying the original volume, but now that remaining air is at atmospheric pressure. Assume the temperature of the air does not change. a. 0.086 m^3 b. 0.096 m^3 c. 0.868 m^3 d. 0.673 m^3 The water passing over Victoria falls, located along the Zambezi River on the border of Zimbabwe and Zambia, drops about 105 m. How much internal energy is produced per kilogram as a result of the fall? a. 1030.05 b. 1260.05 c. 1180.05 d.…PERUUS A metal has an initial oxide coating thickness, y, of 60 nm. After 2 hours at 700°C the oxide has grown to a thickness of 80 nm. Assuming a parabolic growth rate law applies, i.e. y² = c t + d (where, t is the time in hours and both c and d are constants) what will be the approximate thickness of the coating after a total of 36 hours at 700°C? 210 nm. 116 nm. O 232 nm. 420 nm. 126 nm. SVOJE VŠET
