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an engine with an output of 2670 w has an efficiency of 390 it works at 900 cycless how much work is done in each
a heat engine operates between two reservoirs at temperatures of 195oc and 313oc what is the maximum efficiency
250 moles of an ideal gas at an initial pressure of 300 x105 nm2 and an initial volume of 1400 m3 undergo a small
the maximum possible efficiency of a heat engine which exhaust its heat at a temperature of 420o is 440 percent what is
two long parallel wires separated by a distance d carry currents in opposite directions if the left-hand wire carries a
an undersea research chamber is spherical with an external diameter of 350 the mass of the chamber when occupied is
two wheels have the same mass and radius of 48 kg and 054 m respectively one has a the shape of a hoop and the other b
a helicopter has two blades each of which has a mass of 270 kg and can be approximated as a thin rod of length 67 m the
starting from rest a basketball rolls from the top to the bottom of a hill reaching a translational speed of 75 ms
the stanford linear accelerator can accelerate electrons to ener- gies of 50 gev what is their de broglie wavelength
the isotope shift of spectral lines refers to the shift in wave- lengths or frequencies due to the different masses of
in an oscillating lc circuit l 330 mh and c 270 microf at t 0 the charge on the capacitor is zero and the current is
a package of mass is released from rest at a warehouse loading dock and slides down the h 26m - high frictionless
how far from a concave mirror of radius 025 m must an object be place for a real image to be formed 1 m from the mirror
consider a motor that exerts a constant torque of 250 to a horizontal platform whose moment of inertia is 500 assume
a youve been given the task of designing a water couch-that one could lie on floating on a lake for instance-in the
a 00500-kg lead bullet of volume 500 times 106 m3 at 200 degc hits a block that is made of an ideal thermal insulator
a a block of wood in the shape of a cube 50 cm on a side is floating in water with its top face parallel to the surface
a beam of laser light with a wavelenth of 59000 nm passes through a circular aperture of diameter a 0163 mm what is
a grating spectrometer is used to resolve second order peaks from two wavelengths of 1 49500 nm and 2 49571 nm what
a large tower clock like big ben the parliment clock in london has an hour hand 270 m long with a mass of 545 kg and a
using a refracting telescope you observe the planet mars when it is 211 times 1011 m from earth the diameter of the
two ice skaters with masses of 500kg and 750kg are at the center of a 400m -diameter circular rink the skaters push
a student sits on a rotating stool holding two weights each of mass 300 kg when his arms are extended horizontally the
a block of mass m1 300 kg and a block of mass m2 800 kg are connected by a massless string over a pulley in the shape