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a saturated solution of sodium nitrate contains 80 g nano3 per 100 g h2o how many grams of nano3 must be added to a
a ceiling fan consists of a small cylindrical disk with 5 thin rods coming from the center the disk has mass md 34 kg
in the reaction nh3 h2o nh oh- the water molecule serves as a a proton donor b a proton acceptor c a weak base d a
a disk with mass m 88 kg and radius r 038 m begins at rest and accelerates uniformly for t 172 s to a final angular
in the reaction na h2o naoh h2 which of these is true a sodium is oxidized b water is oxidized c hydrogen is
compare and contrast the nitrogen requirements of microorganisms and higher forms of life describing how their
explain why wet hair placed in curlers that is allowed to dry tends to retain the shape of the
the desperate contestants on a tv survival show are very hungry the only food they can see is some fruit hanging on a
a small blob of putty of mass m 900 g falls from the ceiling and lands on the outer rim of a turntable of radius r
the magnetic field of a cylindrical magnet that has a pole-face diameter of 33 cm can be varied sinusoidally between
a fighter jet is launched from the aircraft carrier with the aid of its own engines and a steam powered catapult the
a high intensity desk lamp is rated at 45w but requires only 12v it contains a transformer that converts 120v household
the official record for the lowest temperature ever recorded on earth was set at vostok antarctica on july 21 1983 the
light of wavelength 380 nm is incident on the face of a silica prism at an angle of 1 642 with respect to the normal
a a large asteroid of mass 71700 kg is at rest far away from any planets or stars a much smaller asteroid of mass 930
an electrical engineer constructs a cylindrical solenoid of area 6 cm2 and length 20 cm from 160 m of thin wire the
a 20 x microscope objective is designed for use in a microscope with a 17 cm tube length the objective is marked na
a test for vitamin c ascorbic acid c6h8o6 is based on the reaction of the vitamin with iodine c6h8o6aq i2aq c6h6o6aq
the springs of a 1600 kg car compress 50 mm when its 70 kg driver gets into the drivers seat if the car goes over a
a 535 g of an ideal gas of molecular weight 105 gmol is confined at a pressure of 50 kpa the density of the gas is
a converging lens f1 240 cm is located 560 cm to the left of a diverging lens f2 -280 cm an object is placed to the
a parallel-plate air capacitor has a capacitance of 300 rm pf and a charge of magnitude 0250 mu rm c on each plate the
the isotopes of chlorine are 35 cl and 37 cl while the atomic mass is 355 cl in one molecule of chlorine cl2 it is