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A typical adult ear has a surface area of 1.56 Ã- 10-3 m2. The sound intensity during a normal conversation is about 3.94 Ã- 10-6 W/m2 at the listener's ear. Assume that the sound strikes the surface of the ear perpendicularly. How much power is intercepted by the ear?
assume a bar 2 m long expands 0.6 cm when heated. By how much will a bar 100 m long of the same material expand when similarly heated.
An inductor is connected to a source of sinusoidally varying voltage with constant amplitude and a frequency of 50.0 Hz. what will be the new rms current
A bird watcher meanders through the woods, walking 1.35 km due east, 1.81 km due south, Determine the magnitudes of the bird watchers displacement
A lens system consists of two lenses 48.5 cm apart. The first lens is convex (converging) and has a focal length of 25.22 cm. What is the focal length of the second lens
An LC circuit is built with a 20 mH inductor and an 8.0 microF capacitor. After what time is the capacitor fully charged
A 2.0 cm tall candle flame is 1.8 cm from a wall. You happen to have a lens with a focal length of 36 cm . 1. How many places can you put the lens
A 1000kg sports car accelerates from 0m/s to 33m/s in 13s. What is the average power of the engine
What is the direction of E for points. find the balls initial speed.
If both of them are simultaneously plucked at the center, illustrate what is the frequency of the beats that they will produce when vibrating in their fundamental?
a super-particle travels forward along a straight cylindrical tube at 1000 m/s for 10 m, What is the average velocity
A uniform ring with a radius of 2.15 cm and a total charge of 6.37 ?C rotates with a constant angular speed of 3.84 rad/s, What is the magnetic moment of the rotating ring
At the same time, the stationary trumpeter played the same note. Ballot heard 3.0 beats per second. How fast was the train moving toward him.
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