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The Doppler shift of ultrasonic waves can gauge the speed of blood in an artery. If the frequency of the stationary source is 100 kHz and the reflected sound has a Doppler shift of 200 Hz, Determine is the blood flow speed? (The speed of sound inside the body is 1 500m/s.)
A. 1.0 m/s
B. 1.5 m/s
C. 2.2 m/s
D. 3.3 m/s
A photon has the same momentum as an electron moving with a speed of 1.83×105 m/s. What is the wavelength of the photon
one billiard ball is shot east at 2.4 ms . a second identical billiard ball is shot west at 0.90 ms . the balls have a
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A park merry-go-round consists of a 220 kg circular wooden platform 3.90 m in diameter. What is the kinetic energy of the merry-go-round
A certain compact disc player draws a current of 340 mA at 27.0 V. How much power is required to operate the player
A 50-gram ice cube at 0 degrees celsius is heated until 40 grams has become water at 100 degrees celsius and 5.0 grams has become steam at 100 degrees celsius
a calculate the acceleration due to gravity your weight and your escape velocity for each planet in the solar system
A hoop and a disk, both of 0.58- m radius and 3.0- kgmass, are released from the top of an inclined plane 2.5 m high and 8.8 m long. What is the speed of each when it reaches the bottom? Assume that they both roll without slipping. What is the spe..
A 2.4 kg breadbox on a frictionless incline of angle %u03B8 =43 is connected, by a cord that runs over a pulley, What is the speed of the box when it moves 10 cm down the incline
Musicians can use beats to tune their instruments. One flute is properly tuned and plays the musical note A at exactly 440 Hz. By how much she must shorten her flute to bring it into tune
The graphite in a pencil has a resistivity of 7.84×10^?6 W*m. The graphite's diameter is 0.700 mm and its length is 40.0 mm. Find the resistance of this graphite "wire."
The D string of a violin is a little too tightly stretched. Seven beats per second are heard when the string is sounded together with a tuning fork that is oscillating accurately at 293.66 Hz
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