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a 321 g iron rod initially at 216circ c is submerged into an unknown mass of water at 640circ c in an insulated
in a certain compound microscope the object is 95 mm from the objective the lensesare 310 mm apart and theintermediate
when an automobile moves with constant speed down a highway mostof the power developed by the engine is used to
when 515 ml of 077 m nh43po4 and 150 ml of 109 m mncl3 are mixed a precipitate is formed write the balanced molecular
a neutron star is composed of neutrons and has a densitythat is approximately the same as that of a nucleus what is the
a beam contains 89x106 doubly charged positiveions per cubic centimeter all of which are moving north with aspeed of
if a molecule having an ionization energy of 1096 ev produces a photoelectron having a kinetic energy of 677646e-19 j
a 100 g ball of claytraveling east at 550 mscollides and sticks together with a 600 g ball of claytraveling north at
a 18 m long solenoid is 15 cm in diameterand consists of 2010 turns of wire the current in the solenoid is increasing
a starship moving toward earth with a speed of 080 c launches ashuttle craft in the forward direction the shuttle which
calculate the ph at the equivalence point for the titration of 010 m perchloric acid pkb for nh3 474 consider the
stan raises a 1200-n piano a distance of 500 m using a set ofpulleys stan pulls in 200 m of ropea how much effort force
a diatomic gas has a volume of 2m3 pressure of 200 kpa and atemperature of 50 degrees celsius the gas expands
a wheel rolls 5 revolutions on a horizontal surface withoutslipping if the center of the wheel moves 32 m what is the
how is the direction of an electric field
a merry go round accelerating uniformly from rest achieves thespeed of 25 rpm in 5 revolutions what is the magnitude of
when 0512 grams of a substance is dissolved in 703 grams of naphthalene the solution has a freezing point of 75 degrees
the owner of a van installs a rear-window lens that has a focallength of -0299 m when the owner looks out through the
a centrifuge in a medical laboratory rotates at an angularspeed of 3600 revmin when switched off it rotates 50
if a 456-g sample that is 985 k2cr2o7 by mass is allowed to react with 305 ml of hcl with a density of 115 gml and 301
a baseball player hits a baseball m14kg the ball is initiallytraveling horizontally with a speed of 40 ms the batter
if the total number of electrons in a homonuclear diatomic molecule is 13 what is the overall bond order of the
a potential difference v is applied to a wire of cross-section area of 1 unit length 1 unit and conductivitysigma you
a jogger on a circular track that has a radius of 0250 km runs adistance of 100 km what angular distance does the
a wooden board is 20 m long and has a mass of 10 kg thisboard is supported at each end by cement blocks a and b