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if a pendulum clock keeps perfect time at the base of a mountain, will it also keep perfect time when?
moved to the top of the moutain? explain
The period of a pendulum is T = 2π √(L/g) where L is its length and g is the local gravitational field strength.
At the top of the mountain, g will be slightly less than at the base (g = GM/r^2 where r is the distance from the centre of the earth to the surface). Therefore the period of the pendulum will be slightly more, and it will not keep perfect time.
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Vibrating Alarm Clocks - Perfect For Everyone
Most people encounter a roommate during some point in their life that has to wake up early using a loud, annoying alarm clock. Normally this will wake up everyone else, but there is now a new technology that can tackle that. Now there is such thing as a vibrating alarm clock which does not make a sound so you don't have to worry about waking everyone else around you. These clocks sit under your pillow, on your wrist, or on you thumb and will vibrate when it is time to wake you up. This is perfect for anyone who has a roommate that is on a different sleeping schedule.
These clocks also work for those who are hearing impaired. Those who are hearing impaired might not be able to hear the alarm from your typical noisy clock. A vibrating clock can wake up anyone though as it does not require to hear anything. If you are having hearing troubles and need to wake up at a certain time, then it might be wise for you to check out a vibrating alarm clock instead of using a regular sound-based clock.
If you are just tired of hearing that annoying beeping sound, you have a roommate, or you are hearing impaired, it might be a good idea to check out the new type of clock technology. Vibrating clocks are becoming the new way to wake up in the morning and those that have tried it have loved it. Some good brands that you might want to check out are Sonic Alert and Shake Awake.
About the Author
Jerald Fetch is the owner of the website, Vibrating Alarm Clock, and has been providing consumers everywhere with information about these new types of clocks. His website provides information on various vibrating alarm clock brands and why you should look into using vibrating alarm clocks to wake you up in the morning.
