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a gas consists of 495 grams of oxygen and 495 grams of nitrogen and occupies a volume of 115 liter at a temperature of
a slide projector has a converging lens whose focal length is11700 mm a how far in meters fromthe lens must the screen
to help prevent frost damage fruit growers sometimes protecttheir crop by spraying it with water when overnight
the owner of a van installs a rear-window lens that has a focallength of -0330 m when the owner looks out through the
in a calibration experiment a 104 millimole sample of na2co3 gave 087 millimoles of co2 gas if a 0387 g of pure na2co3
a drum rotates around its central axis at an angular velocity of108 rads if the drum then slows at a constant rate of
in an isometric exercise a person places a hand on a scale and pushes vertically downward keeping the forearm
6- in the reaction 2kmno4 5cooh2 3h2so4 yields 10 co2 2mnso4 k2so4 8h2o is the manganese being oxidized reduced or
a gymnast is performing a floor routine in a tumbling run shespins through the air increasing her angular velocity from
starting from rest a 94-kg firefighter slides down a fire polethe average frictional force everted on him by the pole
a mixture of 0162 moles of c is reacted with 0117 moles of o2 in a seated 100 l vessel at 500 k producing a mixture of
consider a perfectlyelastic collision between two objects of equal mass object 1 is initially moving with a velocity v
the drawing shows an a-shaped ladder both sides of the ladder areequal in length this ladder is standing on a
assume a scuba diver is working at a depth where the total pressure is 50 atm about 50 m below the surface what mole
a cyclist traveling at 5 ms uniformly accelerates up to 10 ms in20 sec each tire of the bike has a 35 cm radius and a
a freight car with a mass of 2500 kg rolls down an inclinedtrack through a vertical distance of 15m at the bottom of
what is the balanced chemical reaction resulting when 50 ml of 2 m kcl and 300 ml of 030 m pbno32 are added
at 320 k and 16 atm pressure the molar volume of ammonia nh3 is about 10 less than the molar volume of an ideal gas the
a laser emits a cylindrical beam of light 13 mm in diameter if the average power of thelaser is 39 mw what is the rms
a volleyball is spiked so that incoming velocity is 37ms is changed to an outgoing velocity of -16 msthe mass of the
a balloon filled wit 500 l of air at sea level is submerged in the water to a depth that produces a pressure of 325 atm
an object initially at rest explodes in two fragments of masses 35 kg and 63 kg that move in diametrically opposite
a gas mixture contains 48 g of n2 74 g of h2 and 66 g of ch4 what is the mole fraction of h2 in the
a particle is uncharged and is thrown vertically upward from ground level with a speed of 250ms as a result it attains
a 92 kg man climbs onto a car worn out shock absorbers and thiscauses the car to drop down 45 cm as he drives along he