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an experimenter arranges to trigger two flash bulbs simultaneouslyproducing a big flash located at the origin of his
a20 kg wagon is pulled along the level ground by a rope inclined at30 degrees above the horizontal a friction force of
a 900 kg car is going 20 ms along a level road how large a constant retarding force is required to stop it in a
when a 58-g tennis ball is served it accelerates from rest to aspeed of 39 ms the impact with theracket gives the ball
the speed of a bobsled is increasing because it has an accelerationof 21 ms2 at a given instantin time the forces
consider a head-on collision between two hydrogen atoms bothinitially in their ground state and moving with the same
common brass is a copper and zinc alloy containing 370 zinc by mass and having a density of 848 gcm3 a fitting
a balloon is filled with helium at a pressure of 10 105 pathe balloon is at a temperature of 23degc and has a radius
when heated calcium and hydroxide and ammonium chloride react to produce ammonia gas water vapor and solid calcium
a solid sphere of moment of inertia 25 mr2 rolls without slipping down an incline plane of 30 degrees from a height of
a rocket of mass 45105 kg is in flight its thrust is directed at anangle of 505deg above the horizontaland has a
a rocket rises vertically from rest with an acceleration of32 ms2 until it runs outof fuel at an altitude of 1000 m
naturally occurring iodine has an atomic mass of 1269045 a 123849- sample of iodine is accidentally contaminated with
you wish to prepare 100ml of a buffer solution that is 025 m in carbonic acid ph 725 you have solid h2co3 and solid
for the molecule ch3cooch3 indicate the orbitals involved in the bonding of the carbon and oxygens draw a picture to
acetic acid is a weak acid ch3co2haq ch3co2-aq haqwhen pure hclo4 a strong acid is added to the aqueous solution of
consider the reaction represented by the equation2so2g o2g 2so3g for the system at chemical equilibrium which of the
a tennis player standing 122 mfrom the net hits the ball at 360degabove the horizontal to clear the net at the apex of
a shavingcosmetic mirror is designed to magnify your face by afactor of 13 when your face is placed 200 cm in front of
hypothetical protein the positive charged guanidinium group of r21 was with in 23a of the side chain carboxylate of
a stone is kicked so that it leaves the ground with an initialvelocity of 10 ms at an angle of 37 degrees the stone is
a spaceships leave earth in opposite directions each with a speedof 050c with respect to eartha what is the velocity of
a 100-g sample of solid nh4cl is heated in a 400-l container to 900k at equilibrium the pressure of nh3g is 110
a 0280 kg croquet ball makes an elastic head-on collisionwith a second ball initially at rest the second ball moves
for the reaction given below 100 moles of a and 300 moles of b are placed in a 100-l containerag 2bg cgat equilibrium