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an astronaut is traveling in a space vehicle that has a speed of0455crelative to earth the astronaut measures his pulse
a bird is flying directly toward a stationary bird-watcher and emits a frequency of 1200 hz the bird-watcher however
a light pipe consists of a central strand of material surrounded by an outer coating the interior portion of the pipe
one prediction of global warming is the melting of global ice which may result in coastal flooding a criticism of this
when one person shouts at a football game the sound intensity level at the center of the field is 611 db when all the
a converging lens of focal length f 51 cmis placed 179 cm to the left of a metallic sphere of radius r 100 102 cm an
a woman stands a distance d from a loud motor that emits sound uniformly in all directions the sound intensity at her
when 0228 g of the hydrate znso4bullxh2o is heated 0128 grams of anhydrous znso4 remains what is the value of x in the
you sing into a well and find that the well resonates at frequencies of 176 hz and 208 hz with no resonances between
a certain kind of glass has an index of refraction of 1655 for blue light of wavelength 430 nm and an index of 162 for
calculate the amount of heat liberated in kj from 316g of mercury when it cools from 748 celcius to 120
in a church choir loft two parallel walls are 588 m apart the singers stand against the north wall the organist faces
in an industrial process nitrogen is heated to 400kelvin at a constant volume of 1m3the gas enters a container at 300k
a small fraction of molecules break down to form positively charged ions and negatively charged ionsa substance that
the acceleration of a certain simple harmonic oscillator is given by a -158 ms2cos251t what is the amplitude of the
how much water would be needed to completely dissolve 165 l of the gas at a pressure of 745 torr and a temperature of
at a height of ten meters above the surface of a freshwater lake a sound pulse is generated the echo from the bottom of
what mass of water in grams is contained in 29 l of the vapor above this solution at 55 c the vapor pressure of pure
tsunamis are fast-moving waves often generated by underwater earthquakes in the deep ocean their amplitude is barely
at 2000 degree c the equilibruim constant for the reaction 2no-gt n2o2 is kc24x103 the initial concentration of no is
at 373 k kp0416 for the equilibruim 2nobr-gt2nobr2 if the pressures of nobr and no are equal what is the equilibruim
for the reaction between h2 and no in the gaseous state experiments showed the following results when the initial
photons of wavelength 430 nm are incident on a metal the most energetic electrons ejected from the metal are bent into
the balanced equation for the reaction of bromate ion with bromide in acidic solution is given by bro3- 5br- 6h -gt
unpolarized light incident through a polarizer passes through a second polarizer placed at an angle theta to the first