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a cylinder containing an ideal gas has a volume of 20 m3 and apressure of 10 times 105 pa at a temperature of 300 k
calculate the ph if 003 mol hcl is added to 0500 l of a buffer solution that is 024 m nh3 and 020 m nh4cl for nh3 kb
1 an astronaut weighs 882 n on earth determinethe weight of the astronaut on the planet x which has a mass 953times
a stream of oilwith specific heat 24 kjkg k flowing at 1000 kghr is to becooled from 130degc to 80degc in a heat
calcium oxide is sometimes very challenging to store in the chemistry laboratory this compound reacts with moisture in
a bat crashes into the vertical front of an accelerating subwaytrain if the coefficient of friction between the bat and
a small package is fired off earths surface with an unknown launchspeed at a 420circ angle with the localhorizontal it
carbon tetrachloride was widely used for many years as a solvent until its harmful properties became well established
a ball swings in a vertical circle at the end of a rope 150 mlong attached to the ceiling when the rope is 369 degrees
if 066 mole of substance has a mass of 99 g what is the molecular mass of the
using raoults and daltons laws explain why an aqueous nacl solution will have a higher boiling point than pure
a planets moon travels in an approximately circular orbit ofradius 70 x 107 m with a period of 6 h 29 min calculate the
a star of mass 20 1028 kg that is 46 x 1020 m from the center of a galaxyrevolves around that center once every 46 x
a certain material is in a room at 27degc if the absolute temperature k of the material is tripled its resistance
a 615-kg racing car completes one lap in 143 sec arounda circular track with a radius of 500 m the car moves at
two skaters one with mass of 58 kg and the other with mass 41 kg stand on an ice rink holding a pole of length 95m and
a spring has a force constant of 371 nm and an unstretched lengthof 6 cm one end is attached to a post that is free to
a crate is sliding down a ramp that is inclined at an angle of38 degrees above the horizontal the coefficient of
an aluminum glider travelling on africtionless air track at 4 ms is overtaking another glider twiceits mass on the same
a 057 kg object connected to alight spring with a force constant of 248 nm oscillates on a frictionless
more energy is lose in perfectly inelastic collisions than in ordinary inelastic collisions whathappens to this
a bat can detect small objects such as an insect whose sizeis approximately equal to one wavelength of the sound the
the drawing shows two situations in which charges are placed onthe x and y axes they are all located at the same
a toaster uses a heating wire when the toaster is turned on at22 degc the initial current is 119 a a few seconds later
suppose that blood flows through the aorta with a speed of028 ms the cross-sectional area of the aorta is 12 10-4m2a