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When an alarm clock rings how will nearby air particles move in relation to the direction of the sound waves?
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How is radioactivity used in smoke detectors?
There are two types of smoke detectors:Photoelectric Smoke detectorsIonizing Smoke DetectorsIonization smoke detectors are more commonly used. The smoke detector uses an ionization chamber and a source of ionizing radiation to detect smoke.Alpha particles are emitted from from the chamber, which ionize the air, so that the air conducts electricity and a small current flows.If smoke enters the alarm, it absorbs the alpha particles causing the current to reduce, and the alarm sounds.Generally, smoke detectors use a weak source made of Americium-241 (241Am95).Note: Alpha particles are the nuclei of a Helium Atom (4He2).
How do you wake up a 5 am shap without a alarm?
you just have to put an alarm for a couple days then you will get used to it and dont have to have an alarm :J
What are an application of an Electric bell?
It is used in fire alarm and in earthquake alarm.
What is the Use of potentiometer in burglar alarm?
to pick the burglarss alarm at the running time
How does a alarm clock with a snooze button work?
Once the alarm goes off - and you press the snooze button, it starts an internal timer for a given period (usually 6-10 minutes depending on the manufacturer). Once the internal timer reaches zero, the alarm is triggered again and the snooze timer resets to its original period. You can usually hit the snooze button indefinitely, but to silence the alarm for good, you need to switch the alarm off.
Location of backup battery for smoke alarm?
In the alarm panel box or an auxiliary box nearby.
What is an alarm substance?
An alarm substance is a chemical given off from the skin of a fish after it has suffered an injury, which warns nearby fish of impending danger.
What is difference between a fire alarm and a burglar alrm?
A fire alarm turns on when the sensor senses heat nearby while a burglar alarm senses movement or forced entry from a specific area it is guarding..
How does personal alarms work?
When faced with an attacker, click the button and a loud alarm will go off. There is also a spray feature that will help. The alarm will create attention which would attract help from people nearby.
Will incense set off a smoke alarm?
Any type of smoke, steam or particles denser than air will set off a smoke alarm. This means that smoke emitted from the incense will set off a smoke alarm when in range of the detector.
Why does your smoke alarm suddenly flash a white light intermittently?
when alpha particles are accelerated between the electrified parallel plates, a few electrons of charged particles are energised and then eject a flash of light on return to original energy level. the probability of this happening is random due to the narrow conditions necessary for such phenomenon. ionising smoke detectors have a small [1 micro curie alpha source] that ejects alpha particles into an electric field. if the flow of alpha particles is prevented [by smoke particles], an alarm is sounded.
Will home alarm systems alert the police if they are set off?
Most home alarm systems are connected to a central monitoring system that will dispatch the police if they are unable to reach the homeowner and make sure everything is okay. It is also possible that any nearby police would be alerted if the alarm went off.
What does SPEED stand for in relation to fires?
Sound the alarm, Phone the fire dept, Evacuate the facility, Extinguish the fire, Direct the firefighters to the fire.
Describe how smoke detectors use alpha particles and what sets off the alarm?
Alpha particles constantly released by americium knock electrons off atoms in the air ionizing the oxygen, nitrogen atoms
What does the fire safety symbol that has a exclamation point mean?
The exclamation mark on any sign is an alarm or warning. With a fire symbol, the sign is warning of combustibles nearby.
How are alpha particles used in smoke alarms?
Alpha radiation is emitted from the amercium button in a smoke detector. When smoke goes into the smoke detector it blocks the stream of alpha particles emitted from the americium. That triggers an alarm.
Where is fuse for alarm located?
Usually fuses for auto alarms are hidden within the system somewhere so they cannot be popped out easily if someone is trying to steal your car. Best thing to do is head to a place that installs alarm systems. They usually are familiar with most alarm systems and could head you in the right direction.
