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Dolphins emit clicks of sound for echolocation and communication. A marine biologist is monitoring a dolphin swimming in seawater where the speed of sound is 1522 m/s. When the dolphin is swimming directly away at 8.4 m/s, the marine biologist measures the number of clicks occurring per second to be at a frequency of 2372Hz. Find the difference (in Hz) between this frequency and the number of clicks per second actually emitted by the dolphin?
an electron in a cathode-ray tube is traveling horizontally at 2.90 times 109 cms when deflection plates give it an
What is the velocity of each ball. while both pipes vibrate at their fundamental frequencies, a beat frequency of 15 Hz is heard. How many centimeters were cut off the end of the second pipe? The speed of sound is 343 m/s.
a luggage conveyor belt is inclined at at an angle 14.8 degrees and has length 330m. the belt moves at a speed of
a person with a remote mountain cabin plans to install her own hydroelectric plant. a nearby stream is 3.00 m wide and
A kicker punts a football from the very center of the field to the sideline 36 yards downfield. What is the direction of the net displacement of the ball
Two parellel plates of area 100 cm^2 are given charges ofequal magnitudes 8.9 X 10^ -7 C but opposite signs. Calculate the dielectric constant of the material
consider a negative charge located between two charged plates of a capacitor. which plate is the plate of high electric potential
A small statue is recovered in an archaeological dig. Its weight is measure to be 211.2 lb and its volume 0.176ft3. What is the statue's weight density
Two metal balls are hung from strings. The first ball, 0.14 kg, is pulled to the side and released, What is the mass of the second ball
A proton travels with the speed of 8.34×105 m/s at an angle of 32.3° with the direction of a magnetic field. The field exerts a force of 3.00×10-17 N on the proton. What is the strength of the field.
a ship has a propeller drive shaft that is turning at 1500rmrevkern 1pt rmkern 1pt rmmin while developing 1750hp . it
A 90° elbow is used to direct water (? = 1000 kg/m3) flow at a rate of 25 kg/s in a horizontal pipe upward. The di-ameter of the entire elbow is 10 cm. The elbow discharges water into the atmosphere, and thus the pressure at the exit is the local ..
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