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a 0629-nm photon collides with a stationary electron after the collision the electron moves forward and the photon
what small molecule is eliminated during the dehydration reaction when acetaldehyde is heated in the presence of
to start a mower a person must pull on a string attached to a pulley with a force of 70n the pulley is a disc of mass
the first four ionization energies of an atom x are 590 1145 4912 and 6491 kjmol suggest to which periodic group x
a 240 h coil with a resistance of 395times102 ohm is in series with a 486times103 ohm resistor this circuit is
a cube of metal has a mass of 0347 kg and measures 313 cm on a side calculate the density and identify the
when elements in the d-block are ionized the electrons enter the nd orbitals before they enter the n1s orbitals explain
how many silver atoms are in a single nanoprisms with an edge length of 45nm and a length of 5 nm the density is 105
a baseball pitcher pivots his extended arm about his shoulder joint applying a constant torque of 190 n middot m for
can someone explain the naming laws to name elements and also how to derive the chemical formula from the names
a 85 kg block moves at 9 ms to the right while a 85 kg block moves at 10 ms to the right the total kinetic energy of
when 335 ml of 0580 m h2so4 is added to 335 ml of 116 m koh in a coffee-cup calorimeter at 2350degc the temperature
a compund with a formula mass of 4208 amu is found to be 8564 carbon and 1436 hydrogen by mass find its molecular
in ionic compounds with certain metals hydrogen exists as the hydride ion h- determine the electron affinity of
a 270 bucket is attached to a disk-shaped pulley of radius 0121 and mass 0842 if the bucket is allowed to fall1 what
the magnetic flux through a circuit is reduced from 35 tm2 to 5 tm2 in 01s the current induced in the circuit is 36 ma
a 12 kg ball drops vertically onto a floor hitting with a speed of 20 m s-1 it rebounds with a speed of 10 m s-1a what
a flask containing 500ml of 3m hci solution requires 1445 ml of 100m naoh for titration how many moles of hci are
two asteroids of equal mass collide with a glancing blow asteroid a which was originally traveling at 400 ms is
a solution is prepared by mixing 500 grams of compound z molar mass is 1500 gmol in 1000 ml of water the density of the
to protect their young in the nest peregrine falcons will fly into birds of prey such as ravens at high speed assume
in a solution containing the following dissolved species which would contribute positively to alkalinity explainspecies
many nuclear reactors use heavy water moderators in which elastic collisions occur between neutrons and deuterons of
if 30 ml of a certain liquid has an initial temperature of 50 degrees and is heated to 100 degrees what is the new
how much heat energy in kilojoules is required to convert 680 grams of ice at -180 degrees c to water at 250 degrees