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on a hot summer day30 degrees celsiusa pesky little mosquito produced its warning sound near your ear the sound is
explain in detail how you would prepare exactly 250 ml of a 475 m solution of sodium hydroxide starting with solid
calculate the ph at the equivalence point for the titration of 025 m ch3cooh with 025 m naoh for ch3cooh ka 18 x
two thin lenses with a focal length of magnitude 195 cm the first diverging and the second converging are located 146
suppose you have a spherical balloon filled with air at room temperature and 10 atm pressure its radius is 11 cm you
two microphones are located on the y axis one1 is at the origin and the other2 is at y 15 meters a source of sound is
two ships are moving along a line due east the trailing vessel has a speed of 620 kmh relative to a land-based
if you bring a negatively charged insulator near two uncharged metallic spheres that are in contact and then separate
a plane flies at 125 times the speed of sound the sonic boom reaches a man on the ground exactly 1 min after the plane
placing an object in a beaker filled with water causes displacement of some water the mass of the object is 20 g and
a uniform 45-t magentic field passes perpendiculary through the plane of a wire loop 010 m2 in an area what flux passes
a student is ice fishing in colorado on a frozen lake over spring break he cuts a circular hole in the ice that has a
an aqueous solution of an unknown monobasic weak base has an initial molarity of 0139 m and a final oh- of 00000316m
two identical spheres each carry a charge of - 400 microc the spheres are separated by a distance of 100 m what is the
a 75m long extension cord carries a current of 12 amps the cord is made of two wires carrying currents in opposite
a 1300 kg truck drives around a flat 230 m -diameter circular race course at 27 ms what is the magnitude of the net
a 2kg block is moving to the right at 10ms just before it strikes and sticks to a 10 kg block initially at rest what is
in an amusement park rocket ride cars are suspended from 425 m cables attached to rotating arms at a distance of 600m
a roller coaster car mass 988 kg is about to roll down a track with a circular loop at the bottom the diameter of the
a point source emits 260 w of sound isotropically a small microphone of effective cross-sectional area 0350 cm2 is
indicate whether or not each of the following compounds is soluble in water if the compound is soluble what ions are
ca particle with a charge of -540 is moving in a uniform magnetic field of -121 the magnetic force on the particle is
the temperature of a monatomic ideal gas with a mass per mole of 000750 kgmol is 298 k the absolute pressure of the gas
aquated iron ii ions undergo a disproportionation reaction to give fe s and aquated iron iii ions that is iron ii ions
some asteroid fragments are large enough to not completely burn up in the atmosphere and they end up on the surface of