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a 500 m long uniform ladder leans against a smooth wall and its base rests on a rough floornbsp the ladder has a mass
an electron is released from rest in an electric field of 213 x 10-10 nc pointing to the right after the electron has
a 25 ohm resistor at steady state draws a current of 10 amperes its temperature is 310 k the temperature of the
what is the entropy change of the gas heated in a steady-flow process at approximately atmospheric pressurea when 800
a 1500kg car moving at 40kmhr is brought to a sudden stop if all the cars kinetic energy is dissipated in heating its
a car has a total mass of 1800kg the volume of air space in the passenger compartment is 500m3 the volume of the motor
an ideal gas cp 72r is heated in a steady-flow heat exchanger from 70degc to 190degc by another stream of the same
a carnot engine receives 250 kj s-1 of heat from a heat-source reservoir at 525c and rejects heat to a heat-sink
liquid isobutane is throttled through a valve from an initial state of 360 k and 4000 kpa to a final pressure of 2000
estimate the change in enthalpy and entropy when liquid ammonia at 270ok is compressed from its saturation pressure of
to determine the center of mass of her body a student lies on aplank of mass m10 kg the plank is supported by two
1 a wave in which the disturbance is perpendicular to the direction of travel of the wave is asemi-harmonic
an automobile battery has an emf of 1260 v and an internal resistance of 0084 0 the headlights together have an
a 31000- kg railroad car with an open top rolls along a straight track with a speed of 491 kmh it passes under a water
a uniform 245- kg spinning disk with a radius of 0253 m is brought to rest by a brake-pad pressed against the side 0200
the three particles shown move along a straight line 1-d one particle is initially moving to the right while the other
a ball of mass 040 kg is fired with velocity 180 ms into the barrel of a spring gun of mass 15 kg initially at rest on
a battery has an emf of 150 v the terminal voltage of the battery is 110 v when it is delivering 220 w of power to an
a certain lightbulb has a tungsten filament with a resistance of 194 when at 200degc and 150 when hot assume the
a portion of nichrome wire of radius 395 mm is to be used in winding a heating coil if the coil must draw a current of
suppose you wish to fabricate a uniform wire from 180 g of copper the wire is to have a resistance of r 0380 and all
suppose the current in a conductor decreases exponentially with time according to the equation it i0e-t where i0 is
the trans-alaskan pipeline is 1300 km long reaching from prudhoe bay to the port of valdez and is subject to
a circuit consists of a 120-v battery connected to three resistors 44ohm 17ohm and 110ohm in seriesa find the current
mercury has a mass mp 318 x 1023 kg an orbital period t 880 days and an orbital radius r 579 x 1010 m assume the