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a stone is projected at a cliff of height h with initial velocity of 42 ms directed 60 degrees above the horizon the
air bag in automobile inflate when sodium azide nan3 rapidly decomposes to its components elements 2nan3 s 2nas 3n2
a spacecraft is launched from the surface of the earth with a velocity of 0480c at an angle of 500deg above the
assuming no heat loss by the system what will be the final temperature when 30 g of water at 100oc are mixed with 78 g
a boy shoots a rock with initial velocity of 40 ms straight up from his slingshot he quickly reloads and shoots another
a typical adult ear has a surface area of 149 times 10-3 m2 the sound intensity during a normal conversation is about
write condensed structural formulas of two esters and a carboxylic acid that each have molecular formula
a series rlc circuit contains the following components r 300 102 l 350 102 mh c 500 microf and a generator with
a diverging lens with a focal length of -22 cm and a converging lens with a focal length of 19 cm have a common central
in aqueous solution amphipathic molecules form aggregates of micelles or bilayers that maximize hydrophobic interaction
a spaceship of proper length298m takes079micros to pass an earth observer determine the speed of this spaceship as
an automobile accelerates from rest at 20 ms2 for 20 s the speed is held constant for 20 s after which there is
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