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Two fire alarms are placed in a building, one 3.1 m north of the other. A person sitting at a desk which is 51.2 m east and 9.9 m north of the point mid-way between the alarms does not hear them when they sound. What is the lowest frequency that the alarms can be sounding at assuming that the alarms are both perfectly in phase?
[speed of sound in air=330m/s]
For real fire alarms dead zones like this are not a problem, why?
A charge +3.9 ?C is placed at the center of the hollow spherical conductor with the inner radius 3.1 cm and outer radius 5.5 cm, What is the total charge on interior and exterior surface
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What is the speed of the bullet.
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A 50-g block of copper at -15?C is added to 100g of water in a 71-g aluminum cup. The cup and the water have an initial temperature of 4.0?C. Find the equilibrium temperature of the cup
Perform the following unit conversions for parts (A) in the table below (B) through. Show your work using a step-wise approach.
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A cargo plane in flight lost a package because somebody forgot to close the rear cargo doors. You are on the team of safety experts trying to analyze what happened, Calculate the time at which the package fell off the back ramp
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