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a student is reading a lecture written on a blackboard the lenses in her eyes have a refractive power of 5805 diopters
a solenoid is designed to produce a magnetic field of 250times102 at its center it has a radius of 170 and a length of
in many cars the passengers side mirror has the following warning objects in mirror are closer than they appear
what mass of barium sulfate can be produced when 1000 ml of a 0100 m solution of barium chloride is mixed with 1000 ml
eight 65 -w christmas tree lights are connected in series to each other and to a 120 -v sourcewhat is the resistance of
an erlenmeyer flask weighs 1488 g when empty when filled with water d 100 gcm3 the flask and its contents weigh 3463
a laser emits a narrow beam of light the radius of the beam is 15 mm and the power is 29 mw what is the intensity of
an air conditioner draws 15 a at 220-v ac the connecting cord is copper wire with a diameter of 1446 mma how much power
assuming the volumes of all gases in the reaction are measured at the same temperature and pressure calculate the
one block has a mass m 500 g the other has mass m 460 g and the pulley which is mounted in horizontal frictionless
nitrous acid hno2 is a weak acid that is partially dissociated broken apart in aqueuous solution what is the
the wires in a household lamp cord are typically 30 mm apart center to center and carry equal currents in opposite
what is indicator auto indicator end point reducing point titration neutrilization
a 1580 kg block of granite is pulled up an incline at a constant speed of 143 ms by a cable and winch the indicated
a horizontal force of magnitude 415 n pushes a block of mass 423 kg across a floor where the coefficient of kinetic
the reaction of water and coal at a high temperature produces a mixture of hydrogen and carbon monoxide gases this
a very slippery ice cube slides in a vertical plane around the inside of a smooth 20 cm diameter horizontal pipe the
dimethyl ether a useful organic solvent is prepared in two steps in the first step carbon dioxide and hydrogen react to
a 20 hp electric motor on a water well pumps water from 10 m below the surface the density of water is 10 kg per
a heat of fusion of dethyl ether ch32ch22o is 1854 kjmol calculate the change in entrophy when 72g of diethyl ether
a second order reaction is found to have an activation energy of 20 kjmol at 298k at what temperature would this
its your birthday and to celebrate youre going to make your first bungee jump you stand on a bridge 110 m above a
when a substance melts bonds between the particles within the solid are broken allowing the particles to become mobile
a ball thrown at an initial angle of 37 and initial velocity of 230ms reaches a maximum height with what initial speed