0
Still curious? Ask our experts.
Chat with our AI personalities
Vivi
Professor
TaigaAdd your answer:
Earn +20 pts
What is the decibel level and range for audible devices set by UL Standard 464?
UL Standard 464 specifies a range of audible alarms for devices, typically requiring that the sound output be at least 85 decibels (dB) at a distance of 10 feet. The standard outlines a frequency range for alarms to be effective, generally between 1,000 Hz to 4,000 Hz, as sounds within this range are more easily perceived by the human ear. Compliance with these specifications ensures that alarms are loud enough to alert individuals in an emergency situation.
A home security system is designed to have a 90 percent reliability rate. Suppose that 9 homes equipped with this system experience a attempted buRgulary The probability that 8 alarms are triggered is?
It is 0.3874.
What are the statistics on various brands of alarms?
With a Palmetto alarm security system, your insurance can be decreased up to 20%. A Palmetto alarm system will protect all entry points of a home, including both doors and windows.
What is the probability of my house burning down?
The answer depends on very many variable which have not been specified. Most important is what your house is made of. Do you have a fire alarms and fire extinguishers? Are there any combustible materials stored in the house? Do you smoke? Do you deep-fry food a lot?
How can Albert Einstein's inventions be used today?
Einstein wasn't an inventor. Although, if he had wanted to be he would probably have been a rather good one. He was a theoretical physicist. He concepts (and supporting mathematics) are used every day in various fields, including astronomy, mathematics, physics, space travel, communications, and many others. He didn't just come up with a couple of interesting concepts. His work changed the nature of physics and related sciences.
