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a laser emits light at power 850mw and wavelength 633 nm the laser beam is focused narroweduntil its diameter matches
an asteroid whose mass is 15 x 10-4 times the mass of earth revolves in a circularorbit around the sun at a distance
a thin rod length is 150 m is oriented vertically with itsbottom end attactched to the floor by means of a
a driver travels northbound on a highway at a speed of 250ms a police car travelling southbound at a speed of 400
a simple 200 m long pendulum oscillates in a location where g 980 ms2 what is the period of motion for this
a diffraction pattern forms when light passes through a singleslit the wavelength of the light is 680 nm determine the
a centrifuge in a medical laboratory rotates at an angularspeed of 3450 revmin when switchedoff it rotates through
a train travelling at 500 kmh approaches another train moving toward the first at 900 kmh if they are 35 km apart on a
a roller coaster at an amusement part starts out an a level track 500 m long and then goes up a 250 m incline at an
a sailor strikes the side of his ship just below the surfaceof the sea he hears the echo of the wave reflected from the
a boat that travels at the speed of 675 ms in still water is to go directly across a river and back the current flows
a flashlight on the bottom of a 360 m deep swimming pool sends a ray upward and at an angle so that the ray strikes the
the maximum electric field 83 m from a point light source is23 vm what area themaximum value of the magnetic field andb
a circular loop with a radius of 200m is placed in a uniformmagnectic field of magnitude 0850t the normal to the loop
a constant horizental force of 12 n is applied to a uniformsolid cylinder by fishing line wrapped around the cylinder
a proton travels through uniform magnetic and electric fieldsthe magnetic field is b -250i mt at one instant the
draw the structure of the organic product formed from the reaction of sodium methoxide with 1-chloro-4-nitrobenzene add
the percent composition by mass of a compound is 400 carbon 530 oxygen and the rest is hydrogen find the empirical
nitrobenzene can be nitrated with a mixture of nitric and sulfuric acids draw the product that contains two nitro
the freezing point of a 0975 mass percent aqueous nacl solution is measured to be -0506 degrees celcius what is the
an unknown sample 07844g containing khp is titrated to the equivalence point with 92ml of 00811m naoh how many moles of
the water solubilities of oxalic acid and sodium oxalatte at room temperature are 10 g100 ml and 37g100ml respectively
a compound of elements x and y has the molecular formula x2y3 let mx be the atomic mass of element x and my subscript-y
the rate constant of a reaction is 53510-5 lmols at 195 c and 690103 lmols at 258 c what is the activation energy of
a toroid having a square cross section 300 cm on a side and an inner radius of110 cm has 500 turns and carries a