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Degger [83]
3 years ago
9

How long would it take a sound wave from a car alarm to travel 1 km if the temperature is 0 degrees Celsius

Physics
1 answer:
Savatey [412]3 years ago
3 0
The speed of sound in dry air at 0°C is 331.3 meters per second.

       (1,000 meters) x (1 second / 331.3 meters)  =  3.018 seconds  .
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When a 25-kg crate is pushed across a frictionless horizontal floor with a force of 200 N, directed 20 below the horizontal, th
Fofino [41]

Answer:

Option E is correct 310N

Explanation:

Given that the force used to push the crate is F = 200N

The force directed 20° below the horizontal

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Check attachment. For free body diagram and better understanding

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