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The Doppler effect using ultrasonic waves of frequency 2.25×10^6 Hz is used to monitor the heartbeat of a fetus. A (maximum) beat frequency of 240 Hz is observed.
1) Assuming that the speed of sound in tissue is 1540 m/s, calculate the maximum velocity of the surface of the beating heart.
In a friendly game of handball, you hit the ball essentially at ground level, How high is the ball when it hits the wall
The earth's atmosphere pushes down on the surface of the earth with a force of 14.7 lb for each square inch of the earth's surface. What is the total weight of the earth's atmosphere
A 24.0 kg child plays on a swing having support ropes that are 2.20 m long. How fast will she be moving at the bottom of the swing
A space traveler weighs 550 N on earth. What will the traveler weigh on another planet whose radius is three times that of earth and evaluate whose mass is twice that of earth?
Two consecutive frequencies are 500 Hz and 540 Hz. ( Stringed instrument; closed-closed) Calculate the fundamental frequency
A small object is placed to the left of a convex lens and on its optical axis. The object is 30 cm from the lens, which has a focal length of 48 cm. Describe the nature of this new image
A very hard rubber ball (m = 0.7 kg) is falling vertically at 9 m/s just before it bounces on the floor. find the average force exerted by the floor on the ball
An object of mass 5kg is moving with an momentum of 50 kg m/s. What is the speed of the object? What is the magnitude of the momentum of the object
A 5 kg block has an initial speed of 10m/s down a frictionless include plane. Determine the amount by which the spring compress
A 100.0 m long rod with a diameter of 3.0 mm has a charge of 1032 C. What is the approximate electric field 3 mm from the surface of the rod
A 15-microF capacitor is connected to a 50-V battery and becomes fully charged, what is the voltage across the capacitor's plates after the slab is inserted
An open organ pipe and an organ pipe that is closed at one end both have lengths of 0.48m at 20 C
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