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The sound intensity of 1.4x10-12 J/m2s is the threshold of hearing for humans. What is the amplitude of the motion of the air molecules if the speed of sound in the air is 331 m/s and the density of air is 1.2 kg/m3? Take the frequency of the air molecules as 1000 Hz.
A battery with an emf of 9.00 V has an internal resistance r. When connected to aresistor R, the terminal voltage is 8.80 V and the current is 0.11A. When a second identical battery is added in series and the externalresistor is R = 15 Ohms what i..
At an outdoor market a bunch of bananas is set to oscillatory motion with amplitude of 20.0 cm on a spring with a force constant of 16 N/m.
A roller coaster, travelling with an initial speed of 15 meters per second, decelerates uniformly at -7 meters per second per second to a full stop. How far does the roller coaster travel throughout its deceleration.
calculate the altitude of geosynchronous satellite, calculate the speed needed to move this mass from the surface fo the Earth to the altitude of 3R_E
the pressure gauge on a tank registers the gauge pressure which is the difference between the interior and exterior
A 0.025-kg block on a horizontal frictionless surface is attached to an ideal massless spring whose spring constant is 150 N/m. what is the kinetic energy of the block
What is the range of wavelengths for FM radio (88 MHz to 108 MHz) and AM radio (535 kHz to 1700 kHz)? (answer: for FM: 2.78m to 3.4m, for AM: 176m to 561m)
A plate carries a charge of -2.55μC, while a rod carries a charge of +2.03μC. How many electrons must be transferred from the plate to the rod, so that both objects have the same charge.
The middle C string on a piano is under a tension of 977 N. The period and wavelength of a wave on this string are 3.82 ms, Find the linear density of the string
A block of wood (Mblock = 5.2 kg) rests on a horizontal surface for which the coefficient of kinetic friction is 0.32. find the initial velocity of the bullet before impact
on a distant planet golf is just as popular as it is on earth. a golfer tees off and drives the ball 4.80 times as far
A beam consisting of 8.22x10^16 electrons/sec passes through a region of vacuum. A) What magnetic field would be measured 1.50cm away from the center of the beam?
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