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Two equal quantities of water, of mass m and at temperatures T1, and T2, are adiabatically mixed together, the pressure remaining constant
What is the change in entropy for the following "reactions"? For the purposes of this exercise treat the pennies as if this was about molecules
100 g of ice is melted at 0 degree C, and the resulting water is warmed to room temperature (25 degree C). Calculate delta S (change in entropy)
A Carnot engine operates on 1 kg of methane, which we shall consider to be an ideal gas. Take ? = 1.35. The ratio of the maximum volume to the minimum volume
A one kilogram block of ice melts at 0°C and slowly warms up to the room temperature 30° C.
A box is seperated by a partition into two parts of equal volume. The left side of the box contains 500 molecules of nitrogen gas; the right side
Mars Global Surveyor spacecraft orbits Mars collecting data. It has collected more Martian images than all the past Mars missions combined.
Electron interactions were characterized by a ratio "b/a". The ratio "b/a" represents:
Where would a positive test charge have the least potential energy?
The average human body has a temperature of 30 degrees celcius, a skin surface are of 1.20mt^2 and an emissivity of 1.0
This is because methane absorbs red light but why greenish blue why not bluish green why not some other colour of the spectrum such as violet or orange
You are a radiation scientist working for the space agency. A Mission Coordinator asks you to design shielding to prevent monoenergetic 10 MeV electrons
You are considering to replace the single glass in your house with double insulated glass.
State the number of valence electrons for a hydrogen atom
Explain clearly the fabrication steps involved in the fabrication of Organic LED.
What property makes a given material a good conductor? What property makes a given material a good insulator?
There is a device which works as heat of pump. This device is able to heat the air at 1 degree per second. The velocity of hot air is 0.5 m/sec
Assume that the body of an airplane is considered as a 20-m long hollow cylindrical structure made up of unknown composite material
The composite wall of an oven consists of three materials, two of which are of known thermal conductivity, kA = 20 W/m?K and kC = 50 W/m.K
A hot plate with an insulated back is considered. The rate of heat loss by natural convection is to be determined.
Dry ice is frozen carbon dioxide. If you have 1.8 kg of dry ice, what volume will it occupy if you heat it enough to turn it into a gas at a temperature of 20°C
An experimenter is studying the effects of temperature, pressure, and type of catalyst on yield from a certain chemical reaction
200 grams of boiling water and 100 grams of ice-cold liquid water are combined in a sealed thermos bottle.
In an experiment, a certain amount of steam was allowed to mix with a known mass of cold water whose temperature is known.
What is the chemical explanation as to why salts of water borne minerals scale on the inside of water piping, specifically carbon steel or stainless steel