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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.
A bullet with mass 4.59 g is fired horizontally into a 1.958-kg block attached to a horizontal spring. Find the initial speed of the bullet-block system
question1a car is stopped at a traffic light. it next travels along a straight road so that itsnbspdistance from the
The electric potential at a position located a distance of 18.0 mm from a positive point charge of 7.60×10-9C, Calculate the value of the second charge
In 4 to 5 billion years, the Sun is expected to enter a red giant phase, in which its outer layers will gradually expand out beyond Earth's present orbit. If the Sun's angular momentum is conserved as it expands, and its mass doesn't change, will its..
Magnus has reached the finals of a strength competition. In the first round, he has to pull a city bus as far as he can. how much work does the tension force do on Magnus
Recent studies have raised concern about `heading' in youth soccer (i.e., hitting the ball with the head). A soccer player `heads' a size 4 ball deflecting it by 59.0°, What is the magnitude of the impulse which the player must impart to the ball
A long wire is known to have a radius greater than 5.2 mm and to carry a current that is uniformly distributed over its cross section, What is the radius (in mm) of the wire
An iron meteorite melts when it enters the Earth's atmosphere. calculate the minimum velocity the meteorite must have had before it entered Earth's atmosphere
A spring stretches 0.05 m when a 0.3 kg mass is suspended from it. find the charecteristic frequency of this mass on the spring
A car entering a freeway ramp accelerates from 14 m/s to 25 m/s in 10 seconds. what is the cars average acceleration during this 10 seconds.
A bullet of mass 0.0022 kg initially moving at 496 m/s embeds itself in a large fixed piece of wood and travels 0.64 m before coming to rest. Imagine that an acceleration of the bullet is constant.
An iron bar of mass, 0.82 kg, slides down a frictionless incline 0.29 m high, What is the speed of the combined masses after collision
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