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assume the combustion of 550 mg of a substance containing only c and h yields 1859 mg of co2 and 381 mg of h2o an
if a 03146-g sample of a mixture of nacls and kbrs was dissolved in water then the resulting solution required 5360 ml
01505 g of k2c2o4 was weighed out and dissolved in 250 ml of 1 m h2so4 it was than titrated with kmno4 and the
ions with a single electron such as he li2 and be3 are explain by the h atom wave functions with za0 substituted for
according to the subsequent reaction explain how many grams of tetraphosphorus decaoxide are necessary for the complete
a ray of light strikes the a-b interface at 50o angle of incidence the index of refraction a is na120 the angles of
a circular saw blade 0200 m in diameter starts from rest in 600 second it accelerates with constant angular
when responding to sound the person eardrum vibrates about its equilibrium position assume an eardrum is vibrating with
a 100 kg mass hangs on a rope wrapped around a freely rotating 200 kg cylinder of radius 100 cm find the tension in
the coefficient of kinetic friction between the floor and a suitcase is 0272 if the suitcase has a mass of 715kg
the owner of a van installs a rear-window lens that has a focal length of -0295m when the owner looks out during the
a 2 kg cart has a spring with k 5000 nm attached to its front parallel to the ground this cart rolls at 4ms toward a
a grizzly bear is sitting on a rock in the middle of a calm river when she observes a fish directly below if the
a cyclist travelling at 50 ms uniformly accelerates up to 10 ms in 20s each tire of the bicycle has a radius of 35 cm
an aluminum rod and a copper rod of equal diameter are joined end to end in good thermal contact the temperature of the
a concrete slab is 109 cm thick and has an area of 51 m2 electric heating coils are installed under the slab to melt
a glass window pane in a home is 062 cm thick and has dimensions of10 m 19 m on a certain day the outdoor temperature
when a banjo string is under a tension of 200n it is tuned to a frequency of 523 hz find the frequency if the tension
a helium-neon laser lambda6328 nm illuminates a diffraction grating the distance between the two m1 bright fringes is
a beam of light is incident from air on the ground of a liquid the angle of incidence is 30deg and the angle of
light in air is incident at the polarizing angle on a certain piece of glass the angle of refraction is 32deg evaluate
a converging lens of focal length 40 cm and a diverging lens of focal length 40 cm are 160 cm apart a 2 cm tall object
a concave mirror forms an inverted image 4 times larger than the object evaluate the focal length of the mirror if the
a student studying the photoelectric effect from 2 different metals records the following informationi the stopping
a gas is enclosed in a container fitted with a piston of cross sectional area 0150 m2 the pressure of the gas is