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a lens for a 35-mm camera has a focal length given by f 67 mma how close to the film should the lens be placed to form
an iron casting containing a number of cavities weighs 65000 n in air and 35000 n in water note the density of iron is
a 000893-kg bullet is fired straight up at a falling wooden block that has a mass of 180 kg the bullet has a speed of
an object made of a single atomic element weighs 20000 n in air and 18965 n when completely submerged in water
calculate the theoretical yield of ammonia produced by the reaction of 100g of h2 gas and 200g of n2
under normal conditions humans radiate electromagnetic radiation of frequency 333 x 1013 hz what is the wavelength
a 23-kg cart is rolling along a frictionless horizontal track towards a 16-kg cart that is held initially at rest the
at any given time the magnitude of the magnetic field in a beam of sunlight is 17 x 10-6 t what is the magnitude of the
in a redox reaction no2- is oxidized to no3- and cu2 is reduced to cu complete and balance the equation for this
a syringe has an area of 07 cm2 at its barrel and then narrows down to an area of 014 mm2 at the needle end if a force
two automobiles are equipped with the same single-frequency horn when one is at rest and the other is moving toward the
suppose that the coefficient of kinetic friction between zaks feet and the floor while wearing socks is 0250 knowing
the quantity of an antimony in a sample can be determined by and oxidation reduction titration with an oxidizing agent
a gas bottle contains a mixture of helium and oxygen molecules o2 is diatomic the root mean square speed vrms for the
the b4o5oh42- ion present in 50 ml of a saturated na2b4o5oh4 solution at a measured temperature is titrated to the
a 200-o resister a 400-mh inductor and a 200-uf capacitor are connected in series with a 12--v rms source at 1000 hza
a solid iron sphere and a solid lead sphere of the same size are each suspended by strings and are submerged in a tank
a ten pound car wheel has a moment of inertia of 052 kg m2 while rotating at a constant speed the wheel makes 6991
the amplitude of the voltage across an inductor can be greater than the amplitude of the generator emf in an rlc
do to friction with the earths atmosphere a large static electric charge could build up on our plummeting asteroid
the windings of a motor have a resistance of 40 o the counter emf of this motor when connected to a 120-v line and
in the reaction a 2b ------gt p the initial concentrations are all 090 m if the equilibrium constant is 15 e -06 what
a student dissolved 01319g of an unknown diprotic acid in 100ml of distilled water the acid was then titrated with
the intensity level of 3929 harmonicas in a harmonica band is 7003 db compute the intensity level generated by one
assuming a soap to be pure sodium stearate give an equation for its reaction with ca2 in hard