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consider a balloon of volume 21m3 that contains 39 moles ofhelium gas at a temperature of 288 k ifthe gas is compressed
draw lewis structure for one important resonance form of hno3 hono2 include all lone pair
when 150 ml of 0400 m h are mixed with 200 ml of 0500 m oh- the final temperature of the solution is 265degc what was
a motor mass of 180kg sits on a horizontal 225 m masslessplank the motor is 100 m from one end of the plank find the
the melting point range is measure for two materials a and b for material a the melting point range is from 585 c to
two blocks of mass 700 kg and 300 kg are placed in contact withone another on a smooth horizontal surface a cosnstant
write a complete set of quantrum numbers nl and m that quantum theories allows for each of the following orbital a 2p
a bedroom bureau with a mass of 37 kgincluding drawers and clothing rests on the floora if the coefficient of static
a student has three gas samples of the same volume all the gases are at the standard temperature and pressure 273 k and
take east as the positive direction an 80 kg fisherman jumps from a dock into a 129 kg rowboat at rest on the west side
an aluminum rod is 185 cm long at 20 c and has a mass of 350g if 15000 j of energy is added to the rod by heat what is
what wavelength should the astrophysicist look for to detect a transition of an electron from the to the
a hot air balloon occupies a volume of 978 l at a temperature of 27 degc what is the temperature in degc if the volume
a 120g iron container holds 150g of water all at 250 degreesc two objects are dropped into the water the firstobject is
calculate the wavelenght and frequencey of light emitted when an electron changes from n4 to n3 in the h atom in what
before opening her parachute an 800-n skydiver reaches a terminal velocity of 120mph at this point what will her
a 45 caliber bullet of mass 162g strikes a stationary wood blockwith a mass of 500g at 331ms the wood block is attached
calculate the maximum non-expansion work per mole that may be obtained from a fuel cell in which the chemical reaction
bill developed a space craft that artificial gravity it has a radius of 50m it starts rotating and attains a constant
state which of the following orbitals cannot exist according to the quantum theory 2s2d3p 4f and
a thin hoop a solid disk and a solid sphere all with the samemass start from rest and roll down a ramp without slipping
a satellite is kept in a circular orbit 30102kmabove the surface of the earth by the force of gravity atthis altitude
suppose an object is placed at the edge of a recordplayer the record player has a diameter 300cm and rotatesat 333 rpm
a certain freely falling object requires 165 s to travel the last 245 m before it hits the ground from what height
an electron moves with a velocity of 25 x10 8 cms what is its wavelengh the 8 next to the cm is suppose to be in