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calcium carbide is an intermediate in the manufacture of acetylene calcium carbide was also used for years in mining
a spacecraft power system generates electricity by absorbing heat from a nuclear reactor operating at 500 c and
a water tank springs a leak find the speed of water emerging from the hole if the leak is 30m below the surface of
an outside loudspeaker considered a small source emits soundwaves with a power output of 90 wa find the intensity 110 m
in a refrigerator heat is transferred from a colder area theinside of the refrigerator to a warmer area the air outside
a bicyclist of mass 81 kg puts all his mass on each downward-moving pedal as he pedals up a steep road take thediameter
the 1100-kg mass of a car includes four tires each of massincluding wheels 35kg and diameter 080m assume each tire
asteroid 433 eros is one of the largest near-earth asteroids forpurposes of this problem assume it is spherical the
a pendulum consists of a mass m suspended by a massless springwith unextended length b and spring constant kthe
a small light source at the bottom of a swimming pool that is30 m deep emits light uniformly in all directions
a stone is tied to a string length 0972 m and whirled in a circle at the same constant speed in two different ways
an astronaut is orbiting a black hole with a mass of20x1031 kg at a distance of 126km from its center the astronaut is
organic hydrogenation reactions in which h2 and an unsaturated organic compound combine are used in the food fuel and
the wheels of an automobile are locked as it slidees to a stop from an initial speed of 267 ms if the coefficient of
the burning of 2051g glucose c6h12o6 in a bomb calorimeter causes the temperature of the water to increase from 2492 to
a bullet mass 10 g is fired horiztally into a block of wood weighing 2000 kg and suspended like a ballistic pendulum
a metal sphere has an outer radius of r2 20 cm the inside is hollow up to a radius of r1 10 cm with the inside
a man goes for a walk starting from the origin of an xyzcoordinate system with the xy plane horizontal and thex axis
a chemist spots an unknown sample on a tlc plate and develops it in dichloromethane solvent only one sport for which
an archer shoots an arrow toward a 300 g target that issliding in her direction at a speed of 350 ms on a
a car in the initial speed of 105mih uniformly accelerates at arate of 055msec2 while it travels 164ma what is the
an unknown metal x was converted to a chloride by reaction with hydrochloric acid the formula of the chloride is
a large cylindrical loop of 288 turns and radius 670 cm carries a current of 700 a a small square loop of 36 turns and
the drive chain in a bicycle is applying a torque of 850 nm to the wheel of the bicycle treat the wheel as a hoop with
consider the reaction of aluminum hydroxide with hydrochloric acid this is a neutralization reaction for every mol of