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Male Rana catesbeiana bullfrogs are known for their loud mating call. The call is emitted not by the frog's mouth but by its eardrums, which lie on the surface of the head. And, surprisingly, the sound has nothing to do with the frog's inflated throat. If the emitted sound has a frequency of 279 Hz and a sound level of 88.0 dB (near the eardrum), what is the amplitude of the eardrum's oscillation (in ?m)? The air density is 1.21 kg/m3 and the speed of sound is 347 m/s.
The two stars in a certain binary star system move in circular orbits. The first star, Alpha, has an orbital speed of 36.0km/s. The second star, Beta, What is the mass of the star Beta and alpha
A cowboy stands on horizontal ground between two parallel vertical cliffs. He is not midway between the cliffs. What is the distance between the cliffs
A woman at an airport is towing her 23.5-kg suitcase at constant speed by pulling on a strap at an angle ? above the horizontal. What is the magnitude of the normal force that the ground exerts on the suitcase
Suppose that an Egyptian farmer claims to have discovered a linen burial cloth used during Egypt's Middle Kingdom some 4000 years ago, How old is the cloth
A block (m = 3 kg) is sitting on a horizontal frictionless table. A spring (k = 500 N/m) is mounted at the side of this block so that when the block is used to compress the spring, with what velocity does it slide across the table
You are given a straight piece of conductor that is 4.6 cm long, find the magnitude of induced voltage that will be produced between the ends of this moving conductor
You are standing at rest with respect to the earth holding a lance which you measure as 10 meters long. Which lance hits the other person first
You are the technical consultant for an action-adventure film in which a stunt calls for the hero to drop off a 24.9-m tall building and land on the ground safely at a final vertical speed of 3.87 m/s. What is the angular acceleration of the drum
An electron has a spin magnetic moment of magnitude ? = 9.285·10–24 A m2. Consequently, it has energy associated with its orientation in a magnetic field.
A 2 ?C negative charge is attracted to a large, well-anchored, positive charge. How much kinetic energy does the negatively charged object gain
What is the maximum velocity.
A spring-loaded toy gun is used to shoot a ball of mass straight up in the air, Find v_m the muzzle velocity of the ball
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