Q.2/A thermocole cubical ice box of side 30 cm has a thickness of 5.0 cm. If 4.0 kg of ice is put in the box, estimate the amount of ice remaining after 6h. The outside temperature is 45C, and thermal conductivity of thermocole box is 0.01 Js'm k', knowing thatilatent heat of fusion is 335* 10 J/kg.
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- What mass of water at 25.0C must be allowed to conic to thermal equilibrium with a 1.85-kg cube of aluminum initially at 1.50 102C to lower the temperature of the aluminum to 65.0C? Assume any water turned to steam subsequently recondenses.gas Lab 11 Instructions: Specific Heat Due: See Course Schedule eesm et elsluols mo nuoy b.e The density of iron is PFe €7.87g/cm3. Calculate the mass of the drilo diansb erT iron cube using the definition of density: p= m/V. Show your calculation. 10cm^3 10X10 x10 X 7.87 1.39/cm 3 7,810 gms Answer: こ take mass : by volum e mass - volum ecc (cm³) こ1 mome erlt sisidile erlt ec. woThe density of brick is pbr = 1.92g/cm³. Calculate the mass of the sriw wole brick cube using the definition of density: p = m/V. Show your pnnuas calculation. omme er euld en T0Answer: xac Massco = 1.42 x 10 cm Icm 3 1.9 Zg eignsit er = 19.2 19.2g こ d. The water and the oil are both in beakers which have a 3-liter capacity. Each of the major tick marks on the beaker is 1 liter, elsidile and each minor tick mark i6 0.2 liters. Examine the beakers and ut6ied determine the volume (in ml) of each liquid. (There are 1000 ml 1000mL= IL in one liter, and that 1 ml = 1 cm³.). hdml lcm3 ierine Answer:uteTegnmet eid) ho…A diver 60 mm deep in 10∘C∘C fresh water exhales a 1.5 cmcm diameter bubble. What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 20∘C∘C? Assume that the air bubble is always in thermal equilibrium with the surrounding water. Express your answer in centimeters.
- The total power emitted by a spherical black body of radius Rat a temperature T is P,. R Let P, be the total power emitted by another spherical black body of radius kept at 2 temperature 27T . The ratio, is (Give your answer upto two decimal places) P2Heat is being supplied at a constant rate of 7.95 kW to 0.2 kg of liquid mercury. If its specific heat capacity is 140 J kg-1 K-1 what is the rate of change of temperature (in K s-1) of the sample?F4 F6 gass containe r has a total wall area Cincluding the lid) of 1-75 m² and a wal thick ness of 1.5 cm. It's filled with 1000g of ice Completely melt at conductiví ty of glass at OC. How many seconds will it take to fusion Is 80 cal/g and Ther mal SC OELETE the ice ? (latent heart of is D-8 w/m k) BACKSPACE TAB a) 120 s S LOCK c) Q,8005 d:) 200 s ENTE
- The saturated vapor pressure of mercury is 0.0020 mmHg at 300 K and the density of air at300 K is 1.18 g L−1. ]ag Calculate the concentration of mercury vapor in air in mol L−1. ]bg Whatis the number of parts per million ^ppmh by mass of mercury in air?Ex. 101 : The cold junction of a thermocouple is maintained at 0°C. If thermo e.m.f. developed by the thermocouple is given by, 02 E =20 0- 30 mV, Find neutral temperature %3D of thermocouple.An incandescent lamp filament, with a surface area of 100 mm2, operates at a temperature of 2300 0 Assume that the filament acts like a blackbody. What is the rate of radiation from the filament? If the walls of the room in which the lamp operates are at 27 0C, what is the rate at which the filament absorbs radiation? At what rate does electrical energy have to supplied tot eh filament to keep its temperature constant? Ignore conduction and convection losses from the filament
- At sufficiently high temperatures, the thermal speeds ofgas molecules may be high enough that collisions may ionize amolecule (that is, remove an outer electron). An ionized gas inwhich each molecule has lost an electron is called a “plasma.”Determine approximately the temperature at which air becomesa plasma.Di O 11:PA (1) Suppose a person is covered head to foot by wool clothing with average thickness of 2 cm and is transferring energy of 6000 joules by conduction through the clothing for 2 minutes. What is the temperature difference across the clothing, given the surface area is 1.4m?? (Given: Thermal conductivity of wool is 0.04 W/mK) The difference in temperature = (2) A 9.15 kg sample of water at 11°C is in a calorimeter. You drop a piece of iron with a mass of 0.41 kg at 260°C into it. After the sizzling subsides, what is the final equilibrium temperature? (Given: Sp. Heat of water 1cal/g°C & Sp. Heat of iron is 0.106 cal/g°C) Equilibrium temperature in celcius =to vyrons lamstal sat to (asluojolid nt) ognalo odi ei jed hour. Her 26. A monatomic gas at a temperature of 600 °K and pressure 300 kPa is inside a container whose volume is 0.100 m³. How many atoms of gas are there? Express your answer as a 00.21 multiple of 1.0 x 1024. degree 20.10 szodato soon (a) 3.62 (b) 3.45 (c) 5.43 (d) 6.46, (e) none of these