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A bat moving at 7.2 m/s is chasing a flying insect. The bat emits a 43 kHz chirp and receives back an echo at 43.68 kHz. At what speed is the bat gaining on its prey? Take the speed of sound in air to be 336 m/s. Answer in units of m/s.
write a two to three page paper in which you1.provide at least three reasons for believing in the accuracy or
Consider two stars, A and B, whose parallaxes are, respectively: 0.01 arcsec and 0.005 arcsec. What are the distances to each star in parsecs
A proton orbits a long charged wire, making 1.60 x 10^6 revolutions per second. The radius of the orbit is 1.40cm. What is the wire's linear charge density
A .32 caliber bullet fired from a revolver with a 3 in long barrel will have a relatively low muzzle speed of about 200 m/s. how fast will it be moving when it returns
Andrea thinks she's sitting at rest in her 5.0-m-long dorm room as she does her physics homework. what range is her velocity
A 0.60kg sphere rotates around a vertical shaft supported by 2 strings. If the tension in the upper string is 18N, calculate the tension in the lower string
A metal ball with a mass of 3.81·10-6 kg and a charge of +5.21 mC has a kinetic energy of 4.77·108 J. how close will it come to the plane before stopping
Differentiate between the following three types of plain carbon steels.
q1. a 78.9 kg man steps off a platform 4.57 m above the ground. he keeps his legs straight as he falls but at the
question1a 0.145-kg baseball pitched horizontally at 39 ms strikes bat and is popped straight up to a height of 32 m.
The trimmer generates a back emf of 18.00 V when it is connected to an emf of 23.0 V dc. How much current flows through the motor when it is running smoothly
A long solenoid has 1.56e+3 turns in length of 40.0 cm. What current has to flow through the solenoid in order to generate a magnetic field
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