Okay there are two questions that I do not understand about vibrations and waves. Here they are:
4. Suppose that a pendulum has a period of 1.5 seconds. How long does it take to make a complete back-and-forth vibration? Is this 1.5-second period pendulum longer or shorter in length than a 1-second period pendulum?
8. Does the medium in which a wave travels move along the wave itself ? Defend your answer.
Please give a thorugh, yet simply understandable answer. Best one will be rewarded 10 points.
2007-02-13 14:20:56 · 4 answers · asked by Alexis's Love Potion #9 4 in Science & Mathematics ➔ Physics
4: The period of a simple pendulum operating under small angle approximation is given by:
T = 2*pi*sqrt(L/g)
http://en.wikipedia.org/wiki/Pendulum#Basic_principles
8: No, otherwise, when someone shouts at you from a distance, you'd feel a gust of wind. Moreover, consider that sound can travel through the air and then through solid objects. But solid objects cannot be moving atoms around to propagate sound.
2007-02-13 14:32:20 · answer #1 · answered by arbiter007 6 · 1⤊ 0⤋
4. Ok...the equation for the pendulum is T=2(pi)sqrt(l/g).
t would be the period or the seconds. since you are solving for length the equation would be l=(t^2g)/(4(pi)^2).
I'm getting .559 meters for the 1.5 second pendulum and .248 meters for the 1 second pendulum. So the first one, with a period of 1.5 seconds, is longer.
8. I'm confused on what it is asking for.
2007-02-13 14:44:47 · answer #2 · answered by Squawkers 4 · 1⤊ 0⤋
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2016-11-03 09:40:34 · answer #3 · answered by Anonymous · 0⤊ 0⤋
the period is the time in which it takes to complete one cycle or one complete swing.
if it takes 1.5 seconds to complete the swing...is that longer or shorter than a swing that has a period of 1 second?
as far as number 8 goes...im not really sure what they're asking
2007-02-13 14:27:05 · answer #4 · answered by mac_addict 3 · 1⤊ 0⤋