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consider the following chemical equations a fe2o3l all ---gt fel al2o3s if 250 g of molten ironiii oxide reacts with
martha travels 25 miles north on her bike then she travels 25 miles due east what is marthas
you use a spring k89nm to pull a 45kg box across the rough floor mu013 the spring stretches 3m what is the horizontal
a freight car with a mass of 10 metric tons is rolling at 108 kmh along a level track when it collides with another
an explosion breaks an object originally at rest into two fragments one fragment acquires twice the kinetic energy of
kim has a metal casting company which makes commemorative coins she has 012 cubic meters of silver which she needs to
the wheels of an automobile are locked as it slides to a stop from an initial speed of 300 ms if the coefficient of
a pendulum has a mass of 37 kg a length of 17 meters and swings throughhalfarc of 281 degrees what is its amplitude to
a very long solenoid with a circular cross section and radius r 810 cm with n 150e 4 turnsm has a magnetic energy
a 1000 kg car is moving at a constant speed of 7ms when it hits the back bumper of another car with 1200 kg of mass
two co-centric hollow spheres have radii of r1 and r2 and have uniform surface charge densities s1 and s2 the two
one and one-half moles of an ideal monatomic gas expand adiabatically performing 7910 j of work in the process what is
a heavy but uniform rope of length l is suspended from a ceiling a particle is dropped from the ceiling at the instant
a steel rod of mass m and length l has the linear expansion coefficient x it is standing vertically and supports a box
a 1000kg car is moving at a constant speed of 7 ms when it hits the back bumper of another car with 1200kg of mass
for which of the following equilibria does kc correspond to an acid-ionization constant ka nh3aq h3oaq nh4aq h2ol
suppose a buffer solution is made from formic and hcho2 and sodium formate nacho2 what is the net ionic equation for
a child makes a ramp to push his toy dump truck up to his sand boxif he uses 5 newtons of force to push his 12 newton
a horizontal force of 80n acts on a mass of 6 kg resting on a horizontal surface the mass is initially at rest and
04 mol of a gas is heated at constant pressure so that its temperature increases from 21deg c to 7983 deg c as a result
block sliding into spring a block of mass m 55 kg is released from rest at a height of h 30 m on a curved
one end of a metal rod is in contact with a thermal reservoir at 691 k and the other end is in contact with a thermal
what is the ph of a solution that is 029 m in acetic acid hc2h3o2 and 074 m in sodium acetate nac2h3o2 at 25degc ka of