Two 12 ft sections of aluminium siding are placed end to end on the outside wall of house. How large a gap should be left between the pieces to prevent buckling if the temperature can change by 55˚C?
is a thermodynamic potential which measures the “useful” work obtainable from a closed thermodynamic system at a constant temperature and volume.
When a 2lb of brass at 212°F is dropped into 5lb of water at 35°F, the resulting temperature is 41.2°F. Find the specific heat of brass in Btu/lb-°F
All the energy we consume ultimately becomes
The change in physical size of a substance when its temperature changes.
Consider a person standing in a breezy room at 22°C. Determine the total rate of heat transfer from this person if the exposed surface area and the average outer surface temperature of the person are 1.2 m^2 and 33°C, respectively, and the convection heat transfer coefficient is 6 W/m^2.ε=0.95 and σ=5.67×10-8 W/m^4-K^4
25. A 50 kg iron block at 80°C is dropped into an insulated tank that contains 0.5 m^3 of liquid water at 25°C. Determine the temperature when thermal equilibrium reached. The specific heat of iron is 0.45kJ/kg-°C and for water is 4.18kJ/kg-°C.
The gas in a constant gas thermometer cooled to absolute zero would have
The distribution of particle speeds in an ideal gas at a given temperature.
It is the transfer of energy from the more energetic particles of substance to the adjacent less energetic ones as a result of interactions between the particles.
It is the energy emitted by the matter in the form of electromagnetic waves as a result of the changes in the electronic configurations of the atom or molecules
A stress which develops within an object when it attempts to expand or contract in response to a temperature changes, but cannot, due to being held rigidly in place
A 466g sample of Water is Heated from 8.50’C to 74.60’C. Calculate the amount of Heat Absorbed (in Kilo Joules) by the Water
A rigid tank contains a hot fluid that is cooled while being stirred by a paddle wheel. Initially, the internal energy of the fluid is 850kJ. During the cooling process, the fluid loses 550kJ of heat, and the paddle wheel does 200kJ of work on the fluid. Determine the final energy of the fluid. Neglect the energy stored in the paddle wheel
In second law of thermodynamic, which of the following state that no device can transfer heat from cooler body to a warmer one without leaving an effect on the surroundings
Is the amount of a substance that contains Avogadro’s number of atoms/molecules.
In order to use a substance to make a thermometer the substance must with a temperature change
It indicates that the rate of heat conduction in a direction is proportional to the temperature gradient in that direction
is the grand total of all energies inside a substance.
The volume of a definite quantity of dry gas is inversely proportional to the pressure provided the temperature remains constant