Recent content by ZzZerozZ

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    Intensity of periodic sound waves

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    Intensity of periodic sound waves

    Homework Statement A firework charge is detonated many meters above the ground. At a distance of 400m from the explosion, the acoustic pressure reaches a maximum of 10.0 N/m2. Assume that the speed of sound is constant at 343 m/s throughout the atmosphere over the region considered, that the...
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    Calculating Torque and Power in Flywheel Energy Storage Systems

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    Calculating Torque and Power in Flywheel Energy Storage Systems

    Homework Statement Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel's energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.5m diameter and a mass of 270kg . Its maximum angular velocity...
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    Why Does Calculating Bullet Transit Time Yield Different Results?

    In a ballistics test, a 25.0g bullet traveling horizontally at 1100m/s goes through a 40.0cm -thick 250kg stationary target and emerges with a speed of 900m/s . The target is free to slide on a smooth horizontal surface. the 1st question of this problem ask: How long is the bullet in the...
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    The Roundup Ride: Experience the Thrill of 14.56m/s^2!

    OO.. yea thanks a lot :D
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    The Roundup Ride: Experience the Thrill of 14.56m/s^2!

    n and Fg pointing downwards?
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    The Roundup Ride: Experience the Thrill of 14.56m/s^2!

    Homework Statement In an amusement park ride called The Roundup, passengers stand inside a 17.0m -diameter rotating ring. After the ring has acquired sufficient speed, it tilts into a vertical plane. Suppose the ring rotates once every 4.80s . If a rider's mass is 52.0kg , with how much...