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a 2kg piece of copper at 200o c is taken out of a furnace and is allowed to cool in air with an ambient temperature of 25o c calculate the entropy
a house is air conditioned using solar energy solar radiation heats a pressurized tank such that the temperature is maintained at 175o c 1500 kj must
two compartments each of 1 m3 capacity are connected by a valve and insulated from the surroundings and from each other one compartment contains
1 calculate the entropy change when 1 kmol of an ideal gas at 300 k and 10 bar expands to a pressure of 1 bar if the temperature stays constant2 what
determine the change in entropy when 2 kg of a gas at 277 k is heated in a closed rigid container to a temperature of 368 k take the specific heat at
for a reversible process involving ideal gases in a closed system show thatdeltas cv lnt2t1 for a constant volume processdeltas cp lnt2t1 for a
high temperatures and pressures are given for the following power plantsisu co-generation 400 psi 750fcity of ames with rdf 700 psi
to determine the temperature that occurred in a re in a warehouse the arson investigator noticed that the relief valve on a methane storage tank had
a locus formed by joining the points which are at the equal distance from the sourceis called
a radiation of 500nm is incident on a metal surface whose work function is 3evwhy do we not observe the phenomenon of photoelectric effectans because
a transistor is a semiconductor device used to amplify and switch electronic signals and electrical power it is composed of semiconductor material
a car of mass 800 kg is pulling a trailer of mass 300 kg up the slope of angle to the horizontal where sine 1200 resistance to motion apart from
a car of mass 800kg is pulling a trailer 300kg where sin a1200resistance to motionapart from gravity is 15n per kg of mad for each vehiclecalculate
invoke the boundary condition phi 00 to obtain a power series where the powers of x are multiples of
a well-insulated electric water heater warms 109 kg of water from 200degc to 490degc in 250 min find the resistance of its heating element which is
what is the fractional change in the resistance of an iron filament when its temperature changes from 250degc to
an iron wire has a cross-sectional area equal to 500times10-6m2 carry out the following steps to determine the drift speed of the conduction
in certain ranges of a piano keyboard more than one string is tuned to the same note to provide extra loudness for example the note at 110 hz has two
a standing wave is described by the wave function where x and y are in meters and t is in seconds a prepare graphs showing y as a function of x
two travelling sinusoidal waves are described by the wave functionsy1 5500 sinpi400x - 1200ty2 5500 sinpi400x - 1200t - 0250where x y1 and y2 are
kinematic chain refers to an assembly of rigid bodies connected by joints that is the mathematical model for a mechanical system as in the familiar
due to surface tension water molecules tend to have minimum surface area and sphere has the minimum surface area for a given volume and therefore
a radiation of 500nm is incident on a metal surface whose work function is 3evwhy do we not observe the phenomenon of photoelecric effect ans we do
if a negative charged particle enters a magnetic field perpendicularlythen it follows a circular pathin what directn does the particle move---in
a constant force of 10n is applied perpendicular to rod placed on 2 parallel rails if the rod is having a resistance 10ohm but rails have zero