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a projectile is launches at 450o with the horizontal its initial speed is 250 msa what is its speed and direction when
the energy of a particle in the n 3 excited state of a harmonic oscillator potential is 587 ev what is the classical
a 200-g hockey puck is launched up a metal ramp that is inclined at a 30 degree angle the coefficents of static and
light of wavelength 530 102 nm passes through a slit of width 0210 mma find the width of the central maximum on a
suppose that 500 ml of a 00500 m solution of pbno32 is mixed with 400 ml of a 0200 m solution of naio3 at 25degc
a transparent oil with index of refraction 128 spills on the surface of water index of refraction 133 producing a
a gas sample in a piston container has a volume of 20 liters at 10 atm and 27 oc the temperature is changed such that
two coils are wound around the same cylindrical form when the current in the first coil is decreasing at a rate of
a sample of ammonia nh3 contains 33x1021 hydrogen atoms what is the mass of the sample in milligramsa 31b 16c 55d 33e
the lengths of the three telescopes are la 498 mm lb 612 mm and lc 824 mm the focal length of the eyepieces is 300
calculate the molarity of the ions present in these salt solutions assume each salt to be 100 dissociateda 075m znbr2b
a student holds a tuning fork oscillating at 201 hz he walks towards a wall at a constant speed of 138 msa what beat
a solution of 536 g of a molecular compound dissolved in 768 g benzene c6h6 and has a boiling point of 8146oc what is
radium-226 atomic mass 226025402 amu decays to radon-224 a radioactive gas with a half-life of 16x103 years what
in a youngs double-slit experiment a set of parallel slits with a separation of 0150 mm is illuminated by light having
sketch a heating curve for a substance x whose melting point is 40 degrees celcius and whose boiling point is 65
the angle of incidence of a light beam in air onto a reflecting surface is continuously variable the reflected ray is
a converging lens has a focal length of 800 cma what is the image distance for an object placed 140 cm from the thin
a 750 ml volume of 0200 m nh3 kb1810-5 is titrated with 0500 m calculate the ph after the addition of 250 ml of
an air filled parallel plate capacitor has plates of area 50cm2 each separated by 030 mm with a dielectric of constant
a 520 ml volume of 035 m ch3cooh ka 1810-5 is titrated with 040 m naoh calculate the ph after the addition of 230 ml
how many grams of dry nh4cl need to be added to 150 l of a 0500 m solution of ammonia nh3to prepare a buffer solution
an electron is confined in a one-dimensional box an infinite well two adjacent allowed energies of the electron are
assuming that the formal charge on the central atom cant be larger than - 1 what is the number of important resonance
write balanced net ionic equations when the following compounds are mixed indicated mixtures where no reaction is