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why is it advisable to run a mixed melting point determination on samples of two different compositions before
a 1500kg satellite is placed in an orbit 8000km above the surface of the eartha what is the gravitational acceleration
a student suspected that an unknown was undergoing a chemical change at its melting point suggest a simple method for
a car traveling 93 is 170 behind a truck traveling 74 how long will it take the car to reach the
melting-point ranges are determined in glass apparatus this means that glass constitutes an impurity in the system why
a rocket is fired straight up and accelerates upward at 12 ms2 for 18 seconds the rocket then runs out of fuel and
a 2500 ml sample of sulfuric acid h2so4 required 2126 ml of 0124 ml n naoh to titrare it to the endpointa calculate the
a steam-powered electrical generator operates at a boiler temperature of 220 c and exhausts to a cooling reservoir at
an isotonic solution contains 087 by mass per volume calculate the percent mass per volume for isotonic solutions
a log is floating on swiftly moving water a stone is dropped from rest from a 720-m-high bridge and lands on the log as
plutonium-241 has a half-life of 144 years and decays to am-241 em-241 has a half life of 4327 years and decays to
a car slows down with an acceleration that has a magnitude of 35 ms2 while doing so it travels 128 m in the x direction
a ball is thrown with an initial speed of 600 ms at an angle of 30 degrees above the horizontal what is the balls
a flywheel with a moment of inertia 600 106 kgm2 is spinning with an angular speed of 120 revs about a vertical axis
sulfur-35 is used in some medical procedures the physical half-life of s-35 is 872 days if the effective half-life of
a whale swims due east for a distance of 184 km turns around and goes due west for 351 km and finally turns around
an ancient piece of wood contains 2 grams of carbon and is found to have 10 c-14 disintegrations per minute per gram of
two masses m1 and m2 are connected by a string which goes over an ideal pulley block m1 has a mass of 300 kg and can
the amount of 250 mol of a perfect gas is heated from 1000 k to 3200 k as a result the gas expands against a constant
a solid sphere rolls without slipping from rest down a plane 400 m long inclined at angle of 420 degree with respect to
to prevent damage to floors and to increase friction a crutch will often have a rubber tip attached to its end if the
a playground carousel is rotating counterclockwise about its center on frictionless bearings a person standing still on
a long string is moved up and down with simple harmonic motion with a frequency of 46 hz the string is 579 m long and
a sphere of radius 100 cm floats in equilibrium partially submerged in water with its lowest point 500cm below the
a mass m5kg is attached to a horizontal spring and placed on a frictionless surface the spring-mass system is