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Two point-source loudspeakers are a certain distance apart, and a person stands 12.0 m in front of one of them on a line perpendicular to the baseline of the speakers. If the speakers emit identical 1000.0-Hz tones, what is their minimum nonzero separation so that the observer hears little or no sound? (Take the speed to be exactly 340 m/s.)
A person holds a ladder horizontally at its center. Treating the ladder as a uniform rod of length 2.75 m and mass 8.00 kg, find the torque the person must exert on the ladder
Starting from rest, a speedboat reaches a speed of 2.30 m/s in 1.2 s. What is the boat's speed after an additional 2.50 s has elapsed, assuming the boat's acceleration remains the same.
Two asteroids head straight for Earth from the same direction. Their speeds relative to Earth are 0.79c for asteroid 1 and 0.60c for asteroid 2. Find the speed of asteroid 1 relative to asteroid 2.
A nuclear power plant produces an average of 4.90 × 103 MW of power during a year of operation. Find the corresponding change in mass of reactor fuel
Suppose a tank contains 624 m3 of neon (Ne) at an absolute pressure of 1.01 105 Pa. What is the increase in the internal energy of the neon
Two thin lenses with a focal length of magnitude 12.0cm , the first diverging and the second converging, are located 9.00cm apart. What is the height of the final image
If the greatest pressure crustal rock can sustain before crumbling is 1.4×109 , find the maximum depth of the Earth's crust
An electron moves in the positive x-direction a distance of 2.31 m in 2.85·10-8 s, bounces off a moving proton, What is the average speed of the electron
What is braking distance for the first train
A neutral conductor contains a hollow cavity in which there is a +100 nC point charge. A charged rod then transfers ??50 nC to the conductor. what is the charge on the inner wall of the cavity wall
A proton is moving with an initial velocity of 6.28 x 10^5 m/s straight towards a large conducting sphere of radius 85.2 cm. What is the voltage on the surface of the sphere
A hunter wishes to cross a river that is 2.1 km wide and that flows with a speed of 3.8 km/h. What is the minimum time necessary for crossing
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