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a source of sound waves of frequency 04 khz is stationary an observer is traveling at 041 times the speed of sounda
a piano tuner sounds two strings simultaneously one has been previously tuned to vibrate at 2830 hz the tuner hears 50
the longest string a thick metal wire on a particular piano is 20 m long and has a tension of 3000 n it vibrates with a
gas is confined in a tank at a pressure of 113 atm and a temperature of 225degc if two-thirds of the gas is withdrawn
a 230 kg object attached to a spring moves without friction and is driven by an external force given by f 300 n
the sun emits electromagnetic waves including light equally in all directions the intensity of the waves at the earths
a light ray is incident upon a plane interface between two materials the ray makes an incident angle with the normal to
when a proton 16 x 10-19 c moves 10 m along the direction of an electric field of strength 30 nc what is the magnitude
a nuclear power plant has an electrical power output of 1800 mw and operates with an efficiency of 30 if excess energy
a body is suspended vertically from an ideal spring of spring constant 31 nm the spring is initially in its relaxed
in sample exercise 1016 we found out that one mole of cl2 confined to 2241l at 0oc deviated slightly from ideal
a sewing machine needle moves with a rapid vibratory motion rather like shm as it sews a seam suppose the needle moves
the third ionization energy of ru is less than the third ionization energy of fe
what concentration of sodium formate nahco2 is needed for a buffer solution at a ph of 362 if it contains formic acid
draw the isomer of c4h8br2 that has the following 1h nmr spectrum 197 s 3 h 389 s 1
a reaction has a rate constant of 121times10-4 at 25 degrees c and 0232 at 79 degrees c the activation barrier for the
a certain nuclear reactor is capable of producing 100 x 109 w of power during its operation mass is converted to energy
a solution is prepared by mixing 1000 g methanol with 1000g propanol at 40c find the mole fraction of each component in
uv light of wavelength 211 nm falls on a silver surface whose work function is 474 ev find the maximum speed of the
a spaceship enters the solar system moving toward the sun at a constant speed relative to the sun by its own clock the
pepsin is the principal digestive enzyme of gastric juice a 300g sample of pepsin is dissolved in enough water to make
a golf ball is struck at ground level the speed of the golf ball as a function of time is shown in the figure below
the haber-bosch process is a very important industrial process in the haber-bosch process hydrogen gas reacts with
a cannon at the top of a 181 m high cliff fires at a pirate ship the cannonball has an initial velocity of 138 ms at
a space probe with a rest mass of 82107kg and a speed of 05c smashes into an asteroid at rest and becomes embedded