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when at rest two trains have sirens that emit a frequency of 300 hz the trains travel toward one another and toward an
a commuter train blows its horn as it passes a passenger platform at a constant speed of 600 ms the train horn sounds
a wheel of radius 06 m starts from rest and accelerates without slipping with an angular acceleration of 20
an alkaline earth atom has 2 valance electrons both can be spin up and spin downa write the singlet statesb discuss
a hammer strikes one end of a thick iron rail of length 583 m a microphone located at the opposite end of the rail
a stone is dropped from rest into a well the sound of the splash is heard exactly 220 s later find the depth of the
to avoid a rear-end collision with a slow moving vehicle ahead you step on the accelerator and increase your angular
an advertisement claims that a centrifuge takes up only 0127m of bench space but can produce a radial acceleration of
a shell is fired with a horizontal velocity in the positive x direction from the top of an 80-m high cliff the shell
a computer disk drive is turned on starting from rest and has a constant angular acceleration if it took 0750 seconds
a steel wire of negligible mass is placed under tension by attaching its bottom to the tip of a solid copper cone of
a dolphin located in sea water at a temperature of 25degc emits a sound directed toward the bottom of the ocean 130 m
a flywheel rotates at 7200 revmin when the power is suddenly cut off the flywheel decelerates at a constant rate of 21
a shaving mirror is a concave mirror used to give someone a close up view of their face if the radius of curvature of
a certain lightbulb is rated at 1750 w when operating at an rms voltage of 120 va what is the peak voltage applied
a communications satellite with a mass of 400kg is in a circular orbit about the earth the radius of the orbit is
if you twirl a small 90-g wooden ball in a circle at 30 revolutions per second on a light 11-cm string approximately
a ship on the surface of the ocean receives a sonar echo back from an underwater object the echo path from the object
on a cold day 28100 j of heat leaks out of a house the inside temperature is 190deg c and the outside temperature is
a horizontal disk of mass 012kg and radius of 013m rotates freely about a vertical axis through its center with an
a 24 gev proton in cosmic radiation moves in earths magnetic field b with a velocity v perpendicular to b in a region
a bowling ball m 1200 kg moving to the right with a speed of 30 ms collides head on in a perfectly inelastic collision
a telescope can be used as a camera if the film is placed at the image position of the objective lens or mirror so the
a conducting sphere with an inner insulating sphere inside of it carries a total charge of 5 nc the charge within the
a spherical asteroid has a radius of 545 km and a surface g of 30 ms2a what is the mass of the asteroidkgb what is the