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a 2000-kg car accelerates uniformly from rest to 30 ms in a time of 20 s what is the net force acting on the
consider the reaction hcoohaq br2aq --gt 2haq 2br-aq co2aq this reaction is known to be first order in br2 and
the drill used by most dentists today is powered by a small air-turbine that can operate at angular speeds of 361000
calculate the charge on the nitrogen atom in the following moleculethere are a pair of non bonding electrons on
a person who weighs 715 n is riding a 98-n mountain bike suppose the entire weight of the rider and bike is supported
an aqueous solution is made by dissolving 017 mol mgcl2 in 550 g water what is the freezing point of this
a 30 kg particle with velocity v 50 ms - 60 ms is at x 30 m y 80 m it is pulled by a 70 n force in the negative x
the liquids propanol p209 torr at 25 degrees celsius and isopropanol p452 torr at 25 degrees celsius are mixed such
a typical adult ear has a surface area of about 190 10-3 m2 the sound intensity during a normal conversation is about
a 022 g sample of a large biomolecule was dissolved in 300 ml of solution the osmotic pressure of this solution was 32
the middle c string on a piano is under a tension of 644 n the period and wavelength of a wave on this string are 382
a solution is made by dissolving 924 g of a non-electrolyte in 800 g chloroform kb363 degrees c-kgmol and tb6126
an aqueous solution is 16 ww h2so4 molar mass9809 what is the mole fraction of h2so4 in this
the unit cell in a crystal of diamond belongs to a crystal system different from any we have discussed the volume of a
unpolarized light passes through two polaroid sheets the transmission axis of the analyzer makes an angle of 219deg
a solution is prepared by dissolving 202 ml of methanol ch3oh in 1000 ml of water at 25 degrees celsius the final
a bullet with an initial velocity of 300ms and a mass of 5g is fired into a block of wood the bullet is brought to a
a solution is made by dissolving 45 g toluene c7h8 in 125 ml of liquid benzene c6h6 d0874 gml what is the molality of
predict products and write the net ionic equation for the following reaction that occurs in aqueous solution the
what is the molarity of cl- ions in a solution prepared by dissolving 50 g nacl molar mass5844 in 15 l of 0025 m
postively charged aluminum ion al3 has a mass of 450-26 kg after being accelerated through a potential difference of
an electric oscillator is made with a 28 micro f capacitor and a 72 mh inductor the capacitor is initially charged up
what is the half-life of a compound if 87 percent of a given sample of the compound decomposes in 72 min assume
a massless spring hangs from the ceiling with a small object attached to its lower end the object is initially held at
how do you know if a molecule has resonance structures or does not have any structures like