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A brass bar, 15 cm in length, is welded to an aluminum bar, 10 cm in length. Both have a cross section of 3 cm on a side. If the free end of the brass bar is at 50 degrees Celcius and the the free end of the aluminum bar is at 25 degrees Celcius, what is the steady-state temperature at the junction of the 2 bars? *
A carpenter spent his morning working using a steel hammer under the heat of the sun. The volume of the hammer is 10 cubic inches at 21 degrees Celcius. After his work, what was the volume of the hammer if the temperature at noon is at 33 degrees Celcius?
Index of refraction of glass of angle incidence zero and medium is water
You put a bottle of softdrink in a refrigerator and leave it until its temperature has dropped 10.0K.What is its temperature change in(a)Foand(b)Co?
A piece of steel of mass 35.0kg is taken out of a furnace at 820degree C and dropped into oil held in a steel container of mass 20.0kg. The oil and container are at 16.0degree C. For safety reasons, the final equilibrium temperature of the steel, oil and container must not exceed 40.0degree C. (Specific heat capacities are: steel 450J/kg/K and oil 2700J/kg/K)
what is the minimum mass of the oil?
A sample containing 1.00 kmol of helium (treated as an ideal gas) is put
through the cycle of operations shown in the figure. BC is an isotherm,
and pA = 1.00 atm, VA = 22.4 m3
, pB = 2.00 atm.
'n 1.00 kmol monster helium (soos 'n ideale gas hanteer) ondergaan 'n stel
prosesse in ‘n siklus, soos aangetoon in die figuur. BC is 'n isoterm, en pA
= 1.00 atm, VA = 22.4 m3
, pB = 2.00 atm.
a) Calculate the temperatures TA, TB and volume VC.
b) Calculate the work done during the cycle. Recall the expression for work done during an isothermal
process.
Three moles of an ideal gas are compressed from 5.5 × 102
to 2.5 × 102 m3
. During the compression, 6.1 × 103
J of work is done on the gas, and heat is removed to keep the temperature of the gas constant at all times.
Calculate the temperature of the gas.
What is heat and thermodynamics with detail
A brass plug has a diameter of 10,000 cm at 20°C. To what temperature must it be cooled in order to fit into a hole A brass plug has a diameter of 10,000 cm at 20°C. To what temperature must it be cooled in order to fit into a hole with a diameter of 9,997 cm? (α =19× 10– 6)1.) A cooler bag at a beach party contains 12 cans of fizzy drinks at 5° C. Each can has a mass of 0.35 kg and a specific heat capacity of 3800 J/(kg.K). Someone adds a 6 5 kg watermelon at 27° C to the bag. The specific heat capacity of watermelon is nearly the same as that of water, i.e. 4.184 J/(kg.K). Ignore the little heat lost to the cooler bag and the environment. Calculate the final temperature T of the fizzy drinks and watermelon.
2.) Three moles of an ideal gas are compressed from 5.5×10^-2 to 2.5×10^-2 m³. During the compression, 6 1×10³ J of work is done on the gas, and heat is removed to keep the temperature of the gas constant at all times. Calculate the temperature of the gas.
