When a metal bar is removed from an oven, its temperature is measured at 300°F. Three minutes later, its temperature is 200°F. How long will it take for the bar to cool down to the room temperature of 70°F

Q: At noon a batch of molten iron at a temperature of 1500 degrees Kelvin is removed from a furnace to…

A: The process will be annealing as the hot metal is allow cool slowly in order to remove internal…

Q: Gas at 70 bars gage pressure and 37.8°C is contained in a 12,900-cm3 cylinder. A piston compresses…

A: The gas gage pressure is = 70 barAtmospheric pressure is = 1.01325 barThe temperature is T1=37.8…

Q: mass of the copper?

A: GIVEN- Heat (q) = 1386J T1= 20 deg.c T2= 80 deg.c Copper heat capacity (C) = 0.385 J/g ° C   To…

Q: Define the Specific gravities of some substances at 0°C?

A: For defining the specific gravity we have to know the values for density of standard fluids or…

Q: A piece of ceramic of mass equals to 0.015 kg initially at 15°C receives 45000J in form of heat when…

A:

Q: What do you mean by specific heat at constant pressure?

A: The process of heat transfer to a gas system can occur or can be done in different ways such as: At…

Q: A thermometer is removed from a room where the temperature is 70° F and is taken outside, where the…

A:

Q: A drum 6 inches in diameter and 40 inches long contained acetylene at 250 psia and 80 degrees…

A:

Q: The warmest temperature ever measured in the United States is 134 °F on July 10, 1913, in Death…

A: Given: The temperature measured in the United States is T1=134 °F

Q: A thermometer is placed in a controlled environment of 25.5C when its initial temperature is 80.25C.…

A: Newtons law of cooling is integrated to arrive the solution.

Q: Specify the condition of the following given. 1.p = 11-MPaa and h = 2805 kJ/kg 2. p = 4-MPaa and s =…

A:

Q: At 2:00 PM, a thermometer reading 80oF is taken outside where the air temperature is 20oF. At 2:03…

A: Given data:- At 2:00 PM thermometer reading = 80o F                             Outside the air…

Q: f I am given two thermodynamic properties of a material as equations with units that are unknown,…

A: There are two thermodynamics properties with unit.

Q: Water in a hydraulic press is subjected to a pressure of 15000 psia at 68°F. If the initial pressure…

A:

Q: 3. Dry saturated steam at 200 bar expands isothermally and reversibly to a pressure of 10 bar.…

A: Given Data State 1: 200 bar,dry saturated State 2: 10 bar Isothermal expansion process

Q: A rigid container (Figure) whose volume is unknown is divided into two parts by a partition. One…

A:

Q: THERMAL PROPERTIES Cp,water = 4, 182 kg°C Pwater = 993- Question 1 How much energy does the cooling…

A: For solution refer below images

Q: Initially, a gas is subjected to standard atmospheric pressure with a temperature reading of 289K…

A: Given: The temperature reading initially, T1 = 289 K The volume of gas initially, V1 = 2830…

Q: Two kilograms of water is contained in a piston-cylinder device where a linear spring is attached to…

A:

Q: The temperature of 1.9 kg of water is 100.0°C, but the water is not boiling, because the external…

A:

Q: Determine the MW and specific heat ratio of a gas whose Cv=1.386 kJ/kg.K and R= 0.485 kJ/Kg.K…

A:

Q: How much work is done when 10 cubic meter of an air is initially at a pressure of 1 atm and a…

A: Given data: V=10 m3P1=1 atmT1=0°FP2=6 atm Need to determine the work is done.

Q: A cylinder which is in a horizontal position contains an unknown noble gas at 42100 Pa and is sealed…

A: Calculate the work done in isobaric process. dW = P*dV dW =P*(Pi*r2l)…

Q: According to newton’s law of cooling, the rate at which a substance cools in air is directly…

A: Write the given values with the suitable variables. T0=30 °FT1=100 °FT2=75 °Ft1=15 minTi=80 °FTf=35…

Q: 8- Air in a closed cylinder undergoes a polytropic process with a polytrophic index of 1.65. a- What…

A:

Q: The iron will be subject to further processing when its temperature is 500 degrees Kelvin. When will…

A:

Q: 2.71 g lead weight, initially at 10.3 ∘C, is submerged in 7.54 g of water at 52.2 ∘C in an insulated…

A:

Q: Measuring the temperature of very cold substances can be challenging. Here is one way of measuring…

A:

Q: A 54g54g copper calorimeter contains 80cm380cm3 at 20∘C20∘C. A very cold 110g110g copper cylindrical…

A: Given Data Mass of the calorimeter is: mc=54 g Volume of the water is: vw=80 cm3 Density of water…

Q: Determine the temperature of the thermal equilibrium between the potatoes in water, and the same…

A:

Q: How much more time(minutes) needs to pass to reach 47°C.

A:

Q: Acetylene is contained in a 0.5-ft cylinder whose length is 40 inches. Initially, the pressure and…

A: Given that ,  d=0.5ft l=40in   =4012  =3.33ftP1=36000 lb/ft2T1=90°F=90+459.67=549.67P2=28800…

Hydronics